An astronaut leaves the International Space Station (ISS) on a tethered line. Although ISS and Earth exert gravitational force on the astronaut, why does she appear to be weightless?
A) Earth only exerts gravitational force on objects at its surface.
B) The mass of the astronaut is insufficient to be affected by gravity.
C) Earth and ISS cancel each other's gravitational force on the astronaut.
D) The distance from Earth and mass of ISS exert negligible gravitational force on the astronaut.

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.

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n

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