4. Sophia propped her Macbook on the edge of her table. The table top is.95 m from the floor and the Macbook has a mass of .85 kg. What is the potential
energy of Sophia's Macbook?*
PE = mxgxh PE = w xh KE = .5 x m X v2 g = 9.8 m/s
0.8073
07923
0 7.913
08.073

Rebekah has a table that has a mass of 21.7 kg. what is the weight of the table? a. 6 n b. 31.5 n c. 9.8 n d. 212.66 n

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

What object a collides with object b and bounces back its final momentum is?