When two objects are touching and transfer heat, it is called

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?