2) Un avión lleva una velocidad de 110km/h, en el momento que inicia su aterrizaje y ha recorrido 1.3km antes de detenerse. Si la aceleración es constante.(3Pts) Calcular: a) La aceleración b) El tiempo que emplea en detenerse c) La distancia que recorre a los 7s de haber iniciado su aterrizaje

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.