motion of particles about their mean position in regular intervals of time is called
wave
the rhythmic rise and fall of ocean water twice a day is called a tide. tides are caused due to the gravitational pull exerted by the sun and the moon on the earth’s surface. physics 101 notes: 8/25 (week 2 continued)  force o defined as a push or a pull, and is a vector quantity, meaning that it has direction depending on which way it is being pushed or pulled o it has amount and direction (how much force is being applied and in which direction it is moving)  newton’s first law o first draft: “an object that is free of forces move in a straight line and covers equal distances in equal time” o final: “an object that is free of external forces moves at a constant velocity”  how does a skater start, stop, or turn? o acceleration: “the rate at which an object’s velocity is changing with time o acceleration, s ocean currents are streams of water flowing constantly on the ocean surface in definite directions. when the water on the surface of the ocean rises and falls alternately, they are called waves. during a storm, the winds blowing at very high speed form huge waves. these may cause tremendous destruction. a quantity which can very from one individual to another is called a variable. dear student,

atomic radii in general decreases left to right in a period and
increases down the group
order of atomic radii is p >s > c > n
decrease in atomic radii on moving from c to n and p to s in a
period is because as we move left to right in a period as the
number of electron increases the number of protons in the nucleus
also increases due to which the valance shell electron experience
greater effective nuclear charge ; therefore more strongly pulled
by the nucleus , thus decreasing their sizes shielding effect
decreases in the order s > p > d orbital electrons s orbital
electrons have greater shielding effect on the nucleus on moving
left to right in a period shielding effect is operable but is same
across a period, therefore here we consider only the increase in
the effective nuclear charge experienced by the valance shell
electrons

regards when a volleyball player smashes a ball, he changes the speed as well as direction of the ball. this is a change of state of motion. however, a change in state of motion is said to occur also when either of the two changes individually. we are asked to complete the sentence. [readmore]a law reliably predicts the behavior of matter, while a theory provides an explanation for that behavior. no, the moment of force is a vector quantity. imagine you are sitting inside a moving bus. when you look outside you will observe that you are moving. now look to the roof of the bus. with respect to the roof of bus, you are at rest. hence it is concluded that rest and motion are relative terms.