with the aid of diagrams, explain how principle of conservation of mechanical energy applies in an apple that falls from a tree

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.

Why do astronauts in the space shuttle weigh less?

The mantle is made up of which structural zones?