Q. Two cars a and b are travelling in the equal direction with velocities A and B(A>B). While the car a is at a distance behind car b, the drive of car a applies break producing uniform retardation r, there will b no collision while?
Q. How various kilograms of water at 25 degrees celsius should come to thermal equilibrium with a 3-kilogram gold bar at 99 degrees celsius in order to lower the bar's temperature to 47 degrees celsius?