The mass of an atom of beryllium is 1.5 x 10^-26 kg. how many beryllium atoms are present in beryllium film of mass 0.37 g used as a window on an x-ray tube? answer in units of atoms.

Two atoms interact with each other as shown by the equation. complete the equation by filling in the missing parts. 1 2 3 4 5 h he li

Displacement is the slope of a velocity vs. time graph a. true b. false

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.