Beginning with equation 2.1(dp=-pg) derive equations 2.9 [p2-p1=-pg(z2-z1)] and 2.11 (p=pgh) assuming constant density.

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

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.