Spaceman Spiff takes a pendulum clock to planet X, where the surface gravity is 1/4that of the Earth. On Earth, the clock keeps perfect time, how much time has elapsed on Planet X during one Earth hour?

you cant move and you feel like someones pushing you down onto your bed it can feel like you want to get up but you just can't it can be extremely scary

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

because if the tool that you are using is not balanced it there would be false mass.