In which situations does Newton's third law play a role? Select all that apply.

A full cart is harder to move than an empty one

A runner moves faster because she has the wind at her back.

When walking, the foot pushes the ground and the ground pushes the foot.

An astronaut moves backward by throwing a hammer forwar

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.