Galaxy b moves away from galaxy a at 0.511 times the speed of light. galaxy c moves away from galaxy b in the same direction at 0.743 times the speed of light. how fast does galaxy c recede from galaxy a. express your answer as a fraction of the speed of light.

0.90891c

Explanation:

u = Speed of Galaxy B relative to Galaxy A = 0.511c

v = Speed of Galaxy C relative to Galaxy B = 0.743c

c = Speed of light

Relativistic equation for velocity is given by

The speed at which galaxy C recedes from galaxy A is 0.90891c

answer: b.

explanation:

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true