Two reversible engines are connected in series. The first one receives heat at T° K and rejects heat at 1527 'C. The second one receives the heat rejected by the first at 1527 'C and then expels heat at 527 'C. Find the temperature T for equal efficiencies of the two engines. (a) 3240' K (b) 2800' K (c) 2054' K (d) 1000' K (e) 3100' K

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed over the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equilibrium.

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

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