Find the impulse of a 50. kg object under the following scenarios:
a. The object accelerates to 7.5 m/s from rest.
b. The object stops from a velocity of 12.0 m/s.
C. The object change in velocity from 2.2 m/s to 6.3
d. The object hits the ground with 2.5 m/s and rebounds with the same speed

Explanation:

When the velocity of an object changes, it would experience an impulse. If the mass of the object stays the same, and that the object moves along a line, the value of the impulse would be:

, where

On the other hand, the change in the object's velocity can be found with the equation:

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Note that if is in and is in , the unit of would be .

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Note that and are of opposite signs. The reason is that the object's velocity has changed direction in this period.

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explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​