Atarget is shielded from a radioactive sample by a sheet of metal. what kind of radiation can pass through the sheet of metal and hit the target?

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

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.