Q. What will be the equilibrium temperature when a 252 block of copper at 275 is placed in a 136 aluminum calorimeter cup containing 807 of water at 14.9?
Q. Police investigators, examining the scene of an accident involving two cars, measure 67 {rm m}-long skid marks of one of the cars, which nearly came to a stop before colliding. The coefficient of kinetic friction between rubber and the pavement is about 0.75. Estimate the initial speed of that car assuming a level road.