Which of the following explains how electricity flows? electrons flow from the positive end of a source towards the negative end. electrons flow from the negative end of a source towards the positive end. protons flow from the negative end of a source towards the positive end. protons flow from the positive end of a source towards the negative end.

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.