We can use the textbook results for head-on elastic collisions to analyze the recoil of the earth when a ball bounces off a wall embedded in the earth. suppose a professional baseball pitcher hurls a baseball ( 155 grams = 0.155 kg) with a speed of 103 miles per hour ( 45.3 m/s) at a wall, and the ball bounces back with little loss of kinetic energy. (a) what is the recoil speed of the earth (m = 6x10^24 kg)? v earth = m/s (b) calculate the recoil kinetic energy of the earth and compare to the kinetic energy of the baseball. the earth gets lots of momentum (twice the momentum of the baseball) but very little kinetic energy. k earth = j k baseball = j

ammonium chloride & tallow

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

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.

a sonic boom is a loud boom that breaks the sound barrier

explanation: