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NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_4046 | image | textbook_images/chemical_equations_22610.png | FIGURE 8.5 Lavoisier carried out several experiments inside a sealed glass jar. Why was sealing the jar important for his results? | 0.290802 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_4277 | image | textbook_images/conservation_of_mass_in_chemical_reactions_22748.png | FIGURE 1.1 Antoine Lavoisier. | 0.287011 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_3177 | image | textbook_images/microscopes_21987.png | FIGURE 1.2 | 0.275974 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_5014 | image | textbook_images/work_23180.png | FIGURE 1.1 | 0.257526 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_0500 | image | textbook_images/early_space_exploration_20346.png | FIGURE 23.12 A rocket pushes in one direction so that it moves in the opposite direction. | 0.255532 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_3229 | image | textbook_images/organization_of_living_things_22025.png | FIGURE 1.1 | 0.24834 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_3588 | image | textbook_images/gravity_22270.png | FIGURE 13.17 Sir Isaac Newton discovered that gravity is universal. | 0.244318 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_3622 | image | textbook_images/pressure_of_fluids_22300.png | FIGURE 15.10 How does Bernoullis law explain each of these examples? | 0.241051 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | DQ_010899 | image | abc_question_images/simple_machines_18197.png | simple_machines_18197.png | 0.230563 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_0985 | image | textbook_images/chemical_weathering_20657.png | FIGURE 1.3 | 0.228136 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_4156 | text | null | Bernoullis law states that the pressure of a moving fluid such as air is less when the fluid is moving faster. Pressure is the amount of force applied per given area. The law is named for Daniel Bernoulli, a Swiss mathematician who discovered it during the 1700s. Bernoulli used mathematics to arrive at his law. | 0.595534 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_4823 | text | null | Newtons third law of motion is just one of many scientific laws. A scientific law is a statement describing what always happens under certain conditions. Other examples of laws in physical science include: Newtons first law of motion Newtons second law of motion Newtons law of universal gravitation Law of conservation of mass Law of conservation of energy Law of conservation of momentum | 0.360771 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_3588 | text | null | People have known about gravity for thousands of years. After all, they constantly experienced gravity in their daily lives. They knew that things always fall toward the ground. However, it wasnt until Sir Isaac Newton developed his law of gravity in the late 1600s that people really began to understand gravity. Newton is pictured in Figure 13.17. | 0.345095 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_3619 | text | null | Some of the earliest scientific research on fluids was conducted by a French mathematician and physicist named Blaise Pascal (16231662). Pascal was a brilliant thinker. While still a teen, he derived an important theorem in mathematics and also invented a mechanical calculator. One of Pascals contributions to our understanding of fluids is known as Pascals law. | 0.33989 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_2550 | text | null | At first, Mendel studied one trait at a time. This was his first set of experiments. These experiments led to his first law, the law of segregation. Then Mendel studied two traits at a time. This was his second set of experiments. These experiments led to his second law, the law of independent assortment. | 0.330073 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_4786 | text | null | All chemical reactionsincluding a candle burninginvolve reactants and products. Reactants are substances that start a chemical reaction. Products are substances that are produced in the reaction. When a candle burns, the reactants are fuel (the candlewick and wax) and oxygen (in the air). The products are carbon dioxide gas and water vapor. | 0.308786 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_0205 | text | null | We usually cant sense the air around us unless it is moving. But air has the same basic properties as other matter. For example, air has mass, volume and, of course, density. | 0.302552 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_4719 | text | null | At Earths gravity, what is the weight in newtons of an object with a mass of 10 kg? At Earths gravity, 1 kg has a weight of 10 N. Therefore, 10 kg has a weight of (10 kg x 10 m/s2 ) = 100 N. | 0.29933 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_4276 | text | null | Why must chemical equations be balanced? Its the law! Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions. | 0.297478 |
NDQ_016255 | bernoulli arrived at his law by using | null | a. astronomy., b. psychology., c. mathematics., d. none of the above | c | T_3592 | text | null | Regardless of what gravity is a force between masses or the result of curves in space and time the effects of gravity on motion are well known. You already know that gravity causes objects to fall down to the ground. Gravity affects the motion of objects in other ways as well. | 0.294463 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_3800 | image | textbook_images/properties_of_electromagnetic_waves_22425.png | FIGURE 21.4 Light slows down when it enters water from the air. This causes the wave to refract, or bend. | 0.333708 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | DQ_002449 | image | abc_question_images/types_clouds_18206.png | types_clouds_18206.png | 0.317585 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | DQ_002506 | image | question_images/types_clouds_8206.png | types_clouds_8206.png | 0.316102 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_3622 | image | textbook_images/pressure_of_fluids_22300.png | FIGURE 15.10 How does Bernoullis law explain each of these examples? | 0.307524 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | DQ_011173 | image | question_images/optics_refraction_9193.png | optics_refraction_9193.png | 0.299142 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | DQ_011180 | image | question_images/optics_refraction_9196.png | optics_refraction_9196.png | 0.296259 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | DQ_011175 | image | question_images/optics_refraction_9194.png | optics_refraction_9194.png | 0.287384 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_4447 | image | textbook_images/force_22843.png | FIGURE 1.2 | 0.28229 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_4267 | image | textbook_images/condensation_22743.png | FIGURE 1.1 This picture shows the contrail (condensation trail) left behind by a jet. Water vapor in its exhaust gases condensed on dust particles in the air. | 0.282224 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_3897 | image | textbook_images/electricity_and_magnetism_22501.png | FIGURE 25.2 In Oersteds investigation, the pointer of the magnet moved continuously as it circled the wire. | 0.281041 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_4156 | text | null | Bernoullis law states that the pressure of a moving fluid such as air is less when the fluid is moving faster. Pressure is the amount of force applied per given area. The law is named for Daniel Bernoulli, a Swiss mathematician who discovered it during the 1700s. Bernoulli used mathematics to arrive at his law. | 0.588312 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_1753 | text | null | The atmosphere is layered, corresponding with how the atmospheres temperature changes with altitude. By under- standing the way temperature changes with altitude, we can learn a lot about how the atmosphere works. | 0.54741 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_0205 | text | null | We usually cant sense the air around us unless it is moving. But air has the same basic properties as other matter. For example, air has mass, volume and, of course, density. | 0.539831 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_3801 | text | null | Although all electromagnetic waves travel at the same speed, they may differ in their wavelength and frequency. | 0.537533 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_1578 | text | null | The atmosphere has different properties at different elevations above sea level, or altitudes. | 0.535906 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_0262 | text | null | An air mass is a large body of air that has about the same conditions throughout. For example, an air mass might have cold dry air. Another air mass might have warm moist air. The conditions in an air mass depend on where the air mass formed. | 0.53002 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_3592 | text | null | Regardless of what gravity is a force between masses or the result of curves in space and time the effects of gravity on motion are well known. You already know that gravity causes objects to fall down to the ground. Gravity affects the motion of objects in other ways as well. | 0.523338 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_4823 | text | null | Newtons third law of motion is just one of many scientific laws. A scientific law is a statement describing what always happens under certain conditions. Other examples of laws in physical science include: Newtons first law of motion Newtons second law of motion Newtons law of universal gravitation Law of conservation of mass Law of conservation of energy Law of conservation of momentum | 0.521163 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_3623 | text | null | Buoyancy is the ability of a fluid to exert an upward force on any object placed in the fluid. This upward force is called buoyant force. | 0.517375 |
NDQ_016256 | bernoullis law explains how an airplane can stay aloft. | null | a. true, b. false | a | T_3647 | text | null | Two simple machines that are based on the inclined plane are the wedge and the screw. Both increase the force used to move an object because the input force is applied over a greater distance than the output force. | 0.510468 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_3622 | image | textbook_images/pressure_of_fluids_22300.png | FIGURE 15.10 How does Bernoullis law explain each of these examples? | 0.335654 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | DQ_004277 | image | question_images/types_leaves_4714.png | types_leaves_4714.png | 0.314898 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | DQ_005580 | image | abc_question_images/parts_chordate_body_17154.png | parts_chordate_body_17154.png | 0.295126 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | DQ_012195 | image | question_images/optics_reflection_9180.png | optics_reflection_9180.png | 0.288873 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | DQ_004076 | image | question_images/types_leaves_1030.png | types_leaves_1030.png | 0.288156 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | DQ_010928 | image | question_images/simple_machines_9242.png | simple_machines_9242.png | 0.287827 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | DD_0269 | image | teaching_images/optics_reflection_9183.png | This diagram depicts how light rays can reflect off various surfaces. Incident rays will reflect back at a specific angle if the surface is smooth. A rough or broken surface will have reflected rays with a wide variety of reflected angles. The left part of the diagram shows why your reflection in a mirror is smooth and natural looking. | 0.284003 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | DQ_004360 | image | question_images/types_leaves_4769.png | types_leaves_4769.png | 0.283613 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_2024 | image | textbook_images/echinoderms_and_invertebrate_chordates_21334.png | FIGURE 12.30 Typical chordate body plan | 0.283118 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | DQ_002084 | image | abc_question_images/volcanoes_14845.png | volcanoes_14845.png | 0.28167 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_3801 | text | null | Although all electromagnetic waves travel at the same speed, they may differ in their wavelength and frequency. | 0.589538 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_0777 | text | null | Plates move apart at divergent plate boundaries. This can occur in the oceans or on land. | 0.582049 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_3592 | text | null | Regardless of what gravity is a force between masses or the result of curves in space and time the effects of gravity on motion are well known. You already know that gravity causes objects to fall down to the ground. Gravity affects the motion of objects in other ways as well. | 0.576884 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_0262 | text | null | An air mass is a large body of air that has about the same conditions throughout. For example, an air mass might have cold dry air. Another air mass might have warm moist air. The conditions in an air mass depend on where the air mass formed. | 0.576761 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_0815 | text | null | There are two major types of seismic waves. Body waves travel through the Earths interior. Surface waves travel along the ground surface. In an earthquake, body waves are responsible for sharp jolts. Surface waves are responsible for rolling motions that do most of the damage in an earthquake. | 0.572304 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_1797 | text | null | The two types of air pollutants are primary pollutants, which enter the atmosphere directly, and secondary pollutants, which form from a chemical reaction. | 0.571222 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_0229 | text | null | Air temperature in the stratosphere layer increases with altitude. Why? The stratosphere gets most of its heat from the Sun. Therefore, its warmer closer to the Sun. The air at the bottom of the stratosphere is cold. The cold air is dense, so it doesnt rise. As a result, there is little mixing of air in this layer. | 0.570693 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_4999 | text | null | Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed (and speed in general) can be represented by the equation: Speed = Distance Time | 0.568525 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_1753 | text | null | The atmosphere is layered, corresponding with how the atmospheres temperature changes with altitude. By under- standing the way temperature changes with altitude, we can learn a lot about how the atmosphere works. | 0.566483 |
NDQ_016257 | the shape of an airplane wing causes | null | a. air to flow more slowly below the wing than above it., b. air pressure to be greater above the wing than below it., c. air to flow only under the wing and not above it., d. air pressure to be less in front of the wing than behind it. | a | T_1771 | text | null | Thunderstorms are extremely common. Worldwide there are 14 million per year thats 40,000 per day! Most drop a lot of rain on a small area quickly, but some are severe and highly damaging. | 0.565577 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_3622 | image | textbook_images/pressure_of_fluids_22300.png | FIGURE 15.10 How does Bernoullis law explain each of these examples? | 0.2563 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_4260 | image | textbook_images/compound_machine_22737.png | FIGURE 1.1 | 0.248657 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | DQ_005624 | image | question_images/parts_chordate_body_7157.png | parts_chordate_body_7157.png | 0.223343 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | DQ_004076 | image | question_images/types_leaves_1030.png | types_leaves_1030.png | 0.21016 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | DQ_000447 | image | abc_question_images/layers_of_atmosphere_18100.png | layers_of_atmosphere_18100.png | 0.209392 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_1544 | image | textbook_images/petroleum_power_21021.png | FIGURE 1.1 | 0.205384 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_2024 | image | textbook_images/echinoderms_and_invertebrate_chordates_21334.png | FIGURE 12.30 Typical chordate body plan | 0.204044 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_4742 | image | textbook_images/projectile_motion_23032.png | FIGURE 1.2 | 0.201876 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_1713 | image | textbook_images/solar_power_21130.png | FIGURE 1.3 | 0.201415 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_0735 | image | textbook_images/renewable_energy_resources_20492.png | FIGURE 5.9 Solar panels on top of a car could power the car. This technology is a long way from being practical. | 0.201176 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_4536 | text | null | Most cars have at least four cylinders connected to the crankshaft. Their pistons move up and down in sequence, one after the other. A powerful car may have eight pistons, and some race cars may have even more. The more cylinders a car engine has, the more powerful its engine can be. | 0.488843 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_4811 | text | null | An experiment is a controlled scientific study of specific variables. A variable is a factor that can take on different values. For example, the speed of an object down a ramp might be one variable, and the steepness of the ramp might be another. | 0.480988 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_3801 | text | null | Although all electromagnetic waves travel at the same speed, they may differ in their wavelength and frequency. | 0.471298 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_1298 | text | null | Different factors play into the composition of a magma and the rock it produces. | 0.459727 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_4322 | text | null | Distance is the length of the route between two points. The distance of a race, for example, is the length of the track between the starting and finishing lines. In a 100-meter sprint, that distance is 100 meters. | 0.454221 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_0777 | text | null | Plates move apart at divergent plate boundaries. This can occur in the oceans or on land. | 0.450457 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_0228 | text | null | The stratosphere is the layer above the troposphere. The layer rises to about 50 kilometers (31 miles) above the surface. | 0.44827 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_4889 | text | null | The speed of sound is the distance that sound waves travel in a given amount of time. Youll often see the speed of sound given as 343 meters per second. But thats just the speed of sound under a certain set of conditions, specifically, through dry air at 20 C. The speed of sound may be very different through other matter or at other temperatures. | 0.447474 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_4535 | text | null | In a car, the piston in the engine is connected by the piston rod to the crankshaft. The crankshaft rotates when the piston moves up and down. The crankshaft, in turn, is connected to the driveshaft. When the crankshaft rotates, so does the driveshaft. The rotating driveshaft turns the wheels of the car. | 0.446884 |
NDQ_016259 | the spoiler on a racecar is like an upside-down wing. | null | a. true, b. false | a | T_0541 | text | null | The three outer layers of the Sun are its atmosphere. | 0.444941 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_3800 | image | textbook_images/properties_of_electromagnetic_waves_22425.png | FIGURE 21.4 Light slows down when it enters water from the air. This causes the wave to refract, or bend. | 0.297684 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_4183 | image | textbook_images/buoyancy_22689.png | FIGURE 1.1 | 0.292595 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_3624 | image | textbook_images/buoyancy_of_fluids_22302.png | FIGURE 15.12 Fluid pressure exerts force on all sides of this object, but the force is greater at the bottom of the object where the fluid is deeper. | 0.285379 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_0287 | image | textbook_images/weather_forecasting_20178.png | FIGURE 16.23 The greater the air pressure outside the tube, the higher the mercury rises inside the tube. Mercury can rise in the tube because theres no air pressing down on it. | 0.277778 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_3947 | image | textbook_images/behavior_of_gases_22545.png | FIGURE 4.12 As the volume of a gas increases, its pressure decreases. | 0.277011 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_0500 | image | textbook_images/early_space_exploration_20346.png | FIGURE 23.12 A rocket pushes in one direction so that it moves in the opposite direction. | 0.272641 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_4377 | image | textbook_images/electromagnetic_induction_22800.png | FIGURE 1.1 | 0.271317 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_3905 | image | textbook_images/generating_and_using_electricity_22508.png | FIGURE 25.9 This simple setup shows how electromagnetic induction occurs. | 0.27042 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_4139 | image | textbook_images/atomic_forces_22672.png | FIGURE 1.3 | 0.26505 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_3949 | image | textbook_images/behavior_of_gases_22549.png | FIGURE 4.16 A tire pressure gauge measures the pressure of the air inside a car tire. Why is the pressure likely to increase as the car is driven? | 0.261308 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_4940 | text | null | Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and gases. All four types of friction are described below. | 0.524521 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_4536 | text | null | Most cars have at least four cylinders connected to the crankshaft. Their pistons move up and down in sequence, one after the other. A powerful car may have eight pistons, and some race cars may have even more. The more cylinders a car engine has, the more powerful its engine can be. | 0.500808 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_4889 | text | null | The speed of sound is the distance that sound waves travel in a given amount of time. Youll often see the speed of sound given as 343 meters per second. But thats just the speed of sound under a certain set of conditions, specifically, through dry air at 20 C. The speed of sound may be very different through other matter or at other temperatures. | 0.492738 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_4535 | text | null | In a car, the piston in the engine is connected by the piston rod to the crankshaft. The crankshaft rotates when the piston moves up and down. The crankshaft, in turn, is connected to the driveshaft. When the crankshaft rotates, so does the driveshaft. The rotating driveshaft turns the wheels of the car. | 0.490716 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_0205 | text | null | We usually cant sense the air around us unless it is moving. But air has the same basic properties as other matter. For example, air has mass, volume and, of course, density. | 0.484036 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_4239 | text | null | How fast a chemical reaction occurs is called the reaction rate. Several factors affect the rate of a given chemical reaction. They include the: temperature of reactants. concentration of reactants. surface area of reactants. presence of a catalyst. | 0.472998 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_3946 | text | null | For a given amount of gas, scientists have discovered that the pressure, volume, and temperature of a gas are related in certain ways. Because these relationships always hold in nature, they are called laws. The laws are named for the scientists that discovered them. | 0.472859 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_3592 | text | null | Regardless of what gravity is a force between masses or the result of curves in space and time the effects of gravity on motion are well known. You already know that gravity causes objects to fall down to the ground. Gravity affects the motion of objects in other ways as well. | 0.469849 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_0229 | text | null | Air temperature in the stratosphere layer increases with altitude. Why? The stratosphere gets most of its heat from the Sun. Therefore, its warmer closer to the Sun. The air at the bottom of the stratosphere is cold. The cold air is dense, so it doesnt rise. As a result, there is little mixing of air in this layer. | 0.467998 |
NDQ_016260 | air pressure pushing down on a racecar | null | a. increases friction between the car and the track., b. decreases the speed of the car., c. makes it harder to keep the car on the track., d. two of the above | a | T_4174 | text | null | Vaporization is easily confused with evaporation, but the two processes are not the same. Evaporation also changes a liquid to a gas, but it doesnt involve boiling. Instead, evaporation occurs when particles at the surface of a liquid gain enough energy to escape into the air. This happens without the liquid becoming hot enough to boil. | 0.461913 |
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