Physical changes are those which do not affect the chemical properties of a substance. For example, when a paper is cut, the two pieces obtained are still paper. The chemical properties have not changed. Only, physically when one piece is cut to two. A chemical change occurs when the chemical properties change and a new substance with different chemical properties is obtained. For example, when the paper is burnt, it turns to ashes. Hence, this is a chemical change.
When a substance undergoes a physical change, the physical properties of the substance changes like the state (solid to liquid during melting), shape, size, volume etc. Many physical changes are reversible whereas, in general many chemical changes are irreversible.
Displacement is defined as the net distance traveled through the entire trip. That is to say, if you compared where you are at the end of the walk to where you were at the start, the displacement is the distance between those two points.
Distance doesn't compare the two end points. It just counts the total distance you've walked throughout your trip.
Lisa walks once around the block. She starts and ends at the same place. Her displacement is therefore 0 m.
But she has walked 1 mile throughout the trip. Her distance walked is therefore 1 mile.
It changes because force is somewhat like pressure. Force is continuously against the object so as a result, speed changes .
Answer:
put a magnet on a conductive surface
= t(Vf + Vi/2)
<span>Vf + Vi/2 = d/t </span>
<span>Vf = (d/t) - Vi/2 </span>
<span>Answer: Vf = (d/t) - Vi/2 OR (2dt - Vit)/2t
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