How would the inclusion of energy transfer by heat affect the discussion of the block in Fig. 13-3?

(A) Energy might be transferred as heat between the block and the table, changing both block and table but keeping ∆E_int, _{block +table} constant.

(B) Energy might be transferred as heat from the block and

table to their presumably cooler surroundings, thereby decreasing both E_int, block and E_int, _table'

(C) Process of types (A) and (B) can both occur, leading to a net decrease in E_{int block + table’}

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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