Atrain is accelerating at a rate of 2 m/s. if its initial velocity is 20 m/s, what is its
velocity after 30 seconds?
given:
equation:
plug in:

Describe the path of a ray that approaches a mirror parallel to the principal axis.

The softest and hardest minerals are: softest hardest

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.