Which of the following is a change that will not affect the pressure in a container

If a clock aboard a space ship traveling at 0.900 c of the speed of light relative to earth chimes once at the beginning of the hour and again when it reads one hour later, how much time would an observer on earth say elapsed between the two chimes?

The energy produced as a result of this flow of electrons from atom to atom is called

Ain is , is 's of ? 0.62 0.79 1.27 1.50