Anti-anxiety agents work by select one: a. altering levels of neurotransmitters b. blocking the neurotransmitter dopamine c. depressing central nervous system activity d. improving the ability to focus on tasks

Which of these is a physical property

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.

The mass of a proton is approximately equal to the mass of