Nickname for nebula "star _ u _ _ _ _ _

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

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.