Adriver of a car enters a new 110 km/h speed zone on the highway. the driver immediately begins to accelerate and reaches 110 km/h after driving 500 m. if the original speed was 80 km/h, what was the driver’s acceleration?

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.