This topic contains a solution. Click here to go to the answer

Author Question: A star is moving toward Earth at 90 the speed of light. The star emits light, which moves away from ... (Read 120 times)

tfester

  • Hero Member
  • *****
  • Posts: 534
A star is moving toward Earth at 90 the speed of light. The star emits light, which moves away from the star at the speed of light. What do Earth-based astronomers measure for the speed of this light?
 
  A) c
  B) 1.9c
  C) 1.2c
  D) 0.98c
  E) 0.95c

Question 2

In the vicinity of what frequency does an object with a temperature of 1000 K radiate the largest amount of power? (c = 3.00  108 m/s,
 
  Wien displacement law constant equals 2.90  10-3 m  K,
   = 5.670  10-8 W/m2  K4)
  A) 1.0  1014 Hz
  B) 8.0  1014 Hz
  C) 2.3  1014 Hz
  D) 6.7  1014 Hz
  E) 4.1  1014 Hz



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

janieazgirl

  • Sr. Member
  • ****
  • Posts: 300
Answer to Question 1

A

Answer to Question 2

A




tfester

  • Member
  • Posts: 534
Reply 2 on: Jul 29, 2018
Wow, this really help


duy1981999

  • Member
  • Posts: 341
Reply 3 on: Yesterday
Gracias!

 

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

For a complete list of videos, visit our video library