This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A star is moving towards the earth with a speed at 90 the speed of light. It emits light, which ... (Read 151 times)

V@ndy87

  • Hero Member
  • *****
  • Posts: 571
on: Jul 29, 2018
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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

katheyjon

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

A


V@ndy87

  • Member
  • Posts: 571
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

AmberC1996

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Erythrocytes (red blood cells) moving through a capillary in single file. Erythrocytes (red blood cells) moving through a capillary in single file.
Why leaves are green: interaction of light with chloroplasts. Why leaves are green: interaction of light with chloroplasts.
Center of Mass of a Binary Star System Center of Mass of a Binary Star System
Development of the light microscope Development of the light microscope
Testing the corneal light reflex Testing the corneal light reflex
Sea star Sea star
Video: Bipolar Disorder

For a complete list of videos, visit our video library