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15,100 | NDQ_018839 | wave frequency | a wave with a higher frequency has a longer wavelength. | null | null | Multiple Choice | a. true, b. false | b |
15,101 | NDQ_018840 | wave frequency | the frequency of a wave is the same as the frequency of vibrations that caused the wave. | null | null | Multiple Choice | a. true, b. false | a |
15,102 | NDQ_018841 | wave frequency | for waves of the same amplitude, a higher frequency wave has less energy than a shorter frequency wave. | null | null | Multiple Choice | a. true, b. false | b |
15,103 | NDQ_018842 | wave frequency | if 20 waves pass a fixed point in 10 seconds, the frequency of the waves is | null | null | Multiple Choice | a. 200 Hz., b. 100 Hz., c. 20 Hz., d. 2 Hz. | d |
15,104 | NDQ_018843 | wave frequency | the frequency of four different waves is listed below. which wave has the most energy? | null | null | Multiple Choice | a. 2000 Hz., b. 1000 Hz., c. 200 Hz., d. 20 Hz. | a |
15,105 | NDQ_018845 | wave interactions | wave interactions refer to interactions between a wave and | null | null | Multiple Choice | a. another wave., b. its reflected wave., c. its medium., d. none of the above | c |
15,106 | NDQ_018847 | wave interactions | types of wave interactions include | null | null | Multiple Choice | a. reflection., b. refraction., c. diffraction., d. all of the above | d |
15,107 | NDQ_018850 | wave interactions | only sound waves can be reflected. | null | null | Multiple Choice | a. true, b. false | b |
15,108 | NDQ_018852 | wave interactions | refraction occurs because waves change speed in a new medium. | null | null | Multiple Choice | a. true, b. false | a |
15,109 | NDQ_018854 | wave interactions | wave diffraction depends on the | null | null | Multiple Choice | a. size of the obstacle or opening., b. wavelength of the waves., c. speed of the waves., d. two of the above | d |
15,110 | NDQ_018855 | wave interference | wave interference refers to wave interactions that can occur between a wave and | null | null | Multiple Choice | a. another wave., b. its reflected wave., c. its medium., d. two of the above | d |
15,111 | NDQ_018856 | wave interference | when two waves pass through each other in opposite directions, the interference affects their | null | null | Multiple Choice | a. amplitude., b. frequency., c. wavelength., d. two of the above | a |
15,112 | NDQ_018860 | wave interference | constructive interference occurs when the crests of one wave overlap the troughs of the other wave. | null | null | Multiple Choice | a. true, b. false | b |
15,113 | NDQ_018861 | wave interference | destructive interference occurs when the crests of two waves overlap. | null | null | Multiple Choice | a. true, b. false | b |
15,114 | NDQ_018864 | wave interference | standing waves form only when waves reflect at a 90-degree angle. | null | null | Multiple Choice | a. true, b. false | a |
15,115 | NDQ_018868 | wave particle theory | before einstein, all scientists thought that electromagnetic energy consists of waves. | null | null | Multiple Choice | a. true, b. false | b |
15,116 | NDQ_018870 | wave particle theory | einstein based his wave-particle theory on experimental evidence. | null | null | Multiple Choice | a. true, b. false | b |
15,117 | NDQ_018871 | wave particle theory | the double-slit experiments showed that light | null | null | Multiple Choice | a. consists of particles., b. behaves like a wave., c. requires a medium., d. two of the above | d |
15,118 | NDQ_018874 | wave particle theory | photons create interference patterns just as waves do. | null | null | Multiple Choice | a. true, b. false | a |
15,119 | NDQ_018876 | wave speed | speed can be calculated with the equation | null | null | Multiple Choice | a. Speed = Distance x Time., b. Speed = Distance/Time., c. Speed = Time/Distance., d. none of the above | b |
15,120 | NDQ_018878 | wave speed | which equation correctly shows the relationship between wave speed, wavelength, and wave frequency? | null | null | Multiple Choice | a. Wave Speed = Wavelength x Wave Frequency, b. Wave Speed = Wavelength/Wave Frequency, c. Wave Speed = Wave Frequency/Wavelength, d. none of the above | a |
15,121 | NDQ_018879 | wave speed | light always travels at the same speed, but it can have different frequencies and wavelengths. if the frequency of light decreases, its wavelength | null | null | Multiple Choice | a. increases., b. decreases., c. stays the same., d. may increase or decrease. | a |
15,122 | NDQ_018880 | wave speed | the wavelengths of four different waves are listed below. if all four waves have the same speed, which wave has the highest frequency? | null | null | Multiple Choice | a. Wave A: 0.001 m, b. Wave B: 0.01 m, c. Wave C: 0.1 m, d. Wave D: 1.0 m | a |
15,123 | NDQ_018883 | wave speed | the speed of most waves depends on the medium. | null | null | Multiple Choice | a. true, b. false | a |
15,124 | NDQ_018884 | wave speed | waves generally travel fastest through gases and slowest through solids. | null | null | Multiple Choice | a. true, b. false | b |
15,125 | NDQ_018887 | wavelength | the wavelength of visible light determines its color. | null | null | Multiple Choice | a. true, b. false | a |
15,126 | NDQ_018888 | wavelength | wavelength usually is measured in meters. | null | null | Multiple Choice | a. true, b. false | a |
15,127 | NDQ_018889 | wavelength | in a transverse wave, wavelength can be measured as the distance between | null | null | Multiple Choice | a. two adjacent crests., b. a crest and the adjacent trough., c. a crest and the resting position., d. none of the above | a |
15,128 | NDQ_018890 | wavelength | in a longitudinal wave, wavelength can be measured as the distance between | null | null | Multiple Choice | a. two adjacent compressions., b. two adjacent rarefactions., c. a compression and the adjacent rarefaction., d. two of the above | d |
15,129 | NDQ_018891 | wavelength | for waves of the same amplitude, shorter wavelength waves have less energy than longer wavelength waves. | null | null | Multiple Choice | a. true, b. false | b |
15,130 | NDQ_018892 | wavelength | which color of visible light has the longest wavelength? | null | null | Multiple Choice | a. red, b. orange, c. yellow, d. green | a |
15,131 | NDQ_018893 | wavelength | which color of visible light has the most energy? | null | null | Multiple Choice | a. red, b. green, c. blue, d. violet | d |
15,132 | NDQ_018895 | wedge | a wedge is a type of compound machine. | null | null | Multiple Choice | a. true, b. false | b |
15,133 | NDQ_018896 | wedge | examples of wedges include | null | null | Multiple Choice | a. chisels., b. knives., c. scissor blades., d. all of the above | d |
15,134 | NDQ_018897 | wedge | a wedge | null | null | Multiple Choice | a. consists of two inclined planes., b. has two thin ends and a thick center., c. is used to hold objects together., d. none of the above | a |
15,135 | NDQ_018901 | wedge | the ratio of output force to input force for a wedge is always less than 1. | null | null | Multiple Choice | a. true, b. false | b |
15,136 | NDQ_018902 | wedge | a longer thinner wedge has a greater mechanical advantage than a shorter thicker wedge. | null | null | Multiple Choice | a. true, b. false | a |
15,137 | NDQ_018903 | wedge | a wedge with a greater mechanical advantage can do the same amount of work with less input force than a wedge with a lesser mechanical advantage. | null | null | Multiple Choice | a. true, b. false | a |
15,138 | NDQ_018906 | wheel and axle | examples of wheels and axles include | null | null | Multiple Choice | a. Ferris wheels., b. doorknobs., c. steering wheels., d. all of the above | d |
15,139 | NDQ_018909 | wheel and axle | the input force may be applied either to the wheel or the axle of a wheel and axle. | null | null | Multiple Choice | a. true, b. false | a |
15,140 | NDQ_018910 | wheel and axle | a wheel and axle changes the direction of the input force. | null | null | Multiple Choice | a. true, b. false | b |
15,141 | NDQ_018912 | wheel and axle | which statement about a ferris wheel is true? | null | null | Multiple Choice | a. The input force is applied to the axle., b. The input force is less than the output force., c. The output distance is shorter than the input distance., d. none of the above | a |
15,142 | NDQ_018913 | wheel and axle | which statement about a doorknob is false? | null | null | Multiple Choice | a. The input force is applied to the wheel., b. The input force is greater than the output force., c. The mechanical advantage is greater than 1., d. The input distance is longer than the output distance. | b |
15,143 | NDQ_018914 | wheel and axle | a wheel and axle may either increase or decrease the input force. | null | null | Multiple Choice | a. true, b. false | a |
15,144 | NDQ_018916 | why earth is a magnet | the scientist who demonstrated in 1800 that earth is a magnet was | null | null | Multiple Choice | a. Charles Darwin., b. William Gilbert., c. Isaac Newton., d. Marie Curie. | b |
15,145 | NDQ_018917 | why earth is a magnet | earths magnetic north pole is located at 90 degrees north latitude. | null | null | Multiple Choice | a. true, b. false | b |
15,146 | NDQ_018919 | why earth is a magnet | how do the lines of force move in earths magnetic field? | null | null | Multiple Choice | a. from north to south magnetic poles, b. from south to north magnetic poles, c. in circles parallel to the equator, d. none of the above | a |
15,147 | NDQ_018922 | why earth is a magnet | what have scientists learned about why earth is a magnet? | null | null | Multiple Choice | a. Earth’s magnetism is caused by the movement of charged particles., b. Earth’s magnetism is generated in molten metals in the core., c. Earth’s magnetism occurs because the planet is spinning on its axis., d. all of the above | d |
15,148 | NDQ_018923 | why earth is a magnet | earth has a liquid inner core and solid outer core. | null | null | Multiple Choice | a. true, b. false | b |
15,149 | NDQ_018936 | work | any force that is used to move an object does work. | null | null | Multiple Choice | a. true, b. false | b |
15,150 | NDQ_018937 | work | work is done when force is applied | null | null | Multiple Choice | a. for a long enough period of time., b. in the opposite direction that the object moves., c. in the same direction that the object moves., d. two of the above | c |
15,151 | NDQ_018939 | work | the amount of work done depends on the | null | null | Multiple Choice | a. amount of force applied., b. distance the object moves., c. speed with which the object moves., d. two of the above | d |
15,152 | NDQ_018941 | work | you do more work lifting an object if the object is | null | null | Multiple Choice | a. heavier., b. bigger., c. harder., d. warmer. | a |
15,153 | NDQ_018943 | work | you do more work playing basketball than you do studying for a test. | null | null | Multiple Choice | a. true, b. false | a |
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