4) block a has a mass of 3kg and velocity of 13m/s, catching up with a second block b that has a mass of 3kg and is moving with 5m/s in the same direction. they suffer an elastic collision and block b is now moving with 8m/s. what is the speed of block a after collision? 10m/s
8m/s
5m/s
13m/s
18m/s

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.