A crate of fruit with a mass of 34.0 kg and a specific heat capacity of 3750 J/(kg⋅K) slides 8.30 m down a ramp inclined at an angle of 38.4 degrees below the horizontal. If the crate was at rest at the top of the incline and has a speed of 2.45 m/sat the bottom, how much work was done on the crate by friction?Use 9.81 m/s² for the acceleration due to gravity and express your answer in joules.

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.