A large cube of mass M is pushed along a frictionless horizontal surface. A small block of mass m is held to the vertical front of the cube. The coefficient of static friction between the cube and the block is μs.
A) What is the minimum acceleration of the cube that ensures the small block does not slide down?
B) If the cube is accelerated by means of a horizontal pushing force P, what is the smallest magnitude of P that ensures the block does not slide?

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?

If the textbook weighs 19.6 newtons on venus, what is the strength of gravity on venus?

Explain why electric current cannot exist if a current doesn't have a voltage source.