What is the total entropy change if a 0.280 efficiency engine takes 3.78e3 j of heat from a 3.50e2 degc reservoir and exhausts it to a 42.4 degc reservoir?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical