The angular velocity v. time graph for a spinning object has the following equation: y = 5x + 7.5
What is the angular acceleration of this object?

If steel is more dense that lake water, why can a boat float

Ways that industry and agriculture use physical properties to separate substances

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.