An object falls freely from the rest near the surface of the earth. what is the speed of the object when it has fallen 4.9 m from its position?

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

What do you think car designers do if the damage caused by a crash test is too severe?

What are two different ways you could find the value of a? explain these methods.