A 0.5kg ball of clay originally moving at 6m/s strikes a wall and comes to rest in 0.25s, what is the magnitude of the impulse given to the ball of clay?

Could someone me find the answer to this problem.

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius