At the county fair, chris throws a 0.15 kg baseball at a 2.0 kg wooden milk bottle, hoping to knock it off its stand and win a prize. the ball bounces straight back at 20% of its incoming speed, knocking the bottle straight forward. what is the bottle’s speed, as a percentage of the ball’s incoming speed?

So percentage of the incoming speed is 9% by which bottle will move

Explanation:

As we know that ball is projected directly towards the bottle

So here momentum given by the ball is same as momentum gain by the bottle

So first we will find the change in momentum of the ball

Here we know that

Now momentum gain by the bottle is

So percentage of the incoming speed is 9% by which bottle will move

frequency or wavelenth of em radiation in a vacuum

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.