Which statement best describes the role of gravity? it decreases the mass of objects. it increases the density of objects. it repels objects in proportion to their temperature. it draws objects together in proportion to their mass.

Which statement about covalent bonds is true

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

The least penetrating form of radiation is