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

Author Question: How fast does light travel from Proxima Centuri to Earth? a. 4.2 ly b. 4.2 years c. 3 108 m/s ... (Read 78 times)

futuristic

  • Hero Member
  • *****
  • Posts: 638
on: Jul 27, 2018
How fast does light travel from Proxima Centuri to Earth?
 
  a. 4.2 ly b. 4.2 years
  c. 3  108 m/s d. None of the other choices are correct.

Question 2

How long does light take to reach us from Proxima Centuri?
 
  a. 4.2 ly b. 4.2 years
  c. 8.4 AU d. 8.4 km


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Carliemb17

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 27, 2018
Answer to Question 1

c
RATIONALE: Light travels at the speed of light c.

Answer to Question 2

b
RATIONALE: How long refers to time not distance.


futuristic

  • Member
  • Posts: 638
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

Liddy

  • Member
  • Posts: 342
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Comparative sizes of the Earth and the Moon Comparative sizes of the Earth and the Moon
The Sun is the nearest star to Earth. The Sun is the nearest star to Earth.
An air ratchet is a very useful tool that allows fast removal and installation of fasteners, ... An air ratchet is a very useful tool that allows fast removal and installation of fasteners, ...
Foundations of Earth Science, 7th Edition Foundations of Earth Science, 7th Edition
Earth’s tilt and yearly rotation around the sun cause seasonal effects. The 23° tilt of Earth’s ... Earth’s tilt and yearly rotation around the sun cause seasonal effects. The 23° tilt of Earth’s ...
Light micrograph of cells in a strand of Chladophora Light micrograph of cells in a strand of Chladophora
Video: Requirements for nervous signals

For a complete list of videos, visit our video library