A star is moving towards the earth with a speed at 90 the speed ...

[V@ndy87]

A star is moving towards the earth with a speed at 90 the speed of light. It emits light, which moves away from the star at the speed of light. Relative to us on earth, what is the speed of the light moving toward us from the star?
 
  A) 0.90c
  B) c
  C) 1.1c
  D) 1.20c
  E) 1.9c

Question 2

A nuclear fission power plant has an actual efficiency of 39. If 0.25 MW of power are produced by the nuclear fission, how much electric power does the power plant output?
 
  A) 0.098 MW
  B) 9.8 MW
  C) 35 MW
  D) 0.35 MW

[katheyjon]

Answer to Question 1

B

Answer to Question 2

A

[V@ndy87]

Excellent

[amandalm]

Gracias!