How do refracting and reflecting telescopes use convex lenses and mirrors

Refracting telescopes use two lenses to focus the light making the object appear closer. The lenses are in the shape of a convex, they bend the light inwards.

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

True.it is better to buy a washer with a higher efficiency rating