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

Author Question: A small gas laser of the type used in classrooms may radiate light at a power level of 2.0 mW. If ... (Read 32 times)

go.lag

  • Hero Member
  • *****
  • Posts: 667
on: Jul 27, 2018
A small gas laser of the type used in classrooms may radiate light at a power level of 2.0 mW. If the wavelength of the emitted light is 642. nm, how many photons are emitted per second?
 
  What will be an ideal response?

Question 2

For life to have existed continually on the Earth for the past 4 billion years, the oceans must have been
 
  A) completely liquid for this entire time
  B) frozen for most of this time
  C) partially liquid for most of this time
  D) partially frozen for most of this time


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Tonyam972

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Jul 27, 2018
Answer to Question 1

6.5  1015

Answer to Question 2

C


go.lag

  • Hero Member
  • *****
  • Posts: 667
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


Tonyam972

  • Sr. Member
  • ****
  • Posts: 342
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

POWER POINT PRESENTATION logo POWER POINT PRESENTATION logo
Villi and microvilli of the small intestine: (a) Tablet dissolves in the stomach. (b) Medication ... Villi and microvilli of the small intestine: (a) Tablet dissolves in the stomach. (b) Medication ...
Dash Warning Lights: Oil (Engine) Light Dash Warning Lights: Oil (Engine) Light
Projections of global temperature depend heavily on the level of future greenhouse gas emissions Projections of global temperature depend heavily on the level of future greenhouse gas emissions
Finding the derivative using the power rule - Solutions Finding the derivative using the power rule - Solutions
Muscle action in the small intestine Muscle action in the small intestine
Video: Asthma Treatment

For a complete list of videos, visit our video library