The total mass of the roller coaster cart is 1,249 kg. What is its gravitational potential energy relative to the lowest point of the track? _ J

Let g = 9.8 m/s2. Round your answer to tenth, keep one decimal digit. Fill the numerical value in the box without unit.

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.