Two carts, joined together with a spring-loaded mechanism between them, move along on an air track at constant speed. The carts have different inertia, and the heavier cart is in front of the lighter cart. Then the mechanism is released, after which the speeds of the carts relative to each other is four times their original speed relative to the ground. In what direction is the lighter cart moving after the mechanism is released?

In a good thermo flask the main cause of heat loss is

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

What describes the particles in a liquid