PLEASE HELP! thxs

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?

Phase changes are chemical changes. true or false

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx