A pen is thrown downward with an initial speed of 3.0 m/s from a tall building.
After 4.0 seconds, the pen's velocity is m/s.

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

What is a subatomic particle with a negative charge and very little mass?