« previous next »

Author Question: Determine the amount of energy carried in 50 m of a 3.5-mW He-Ne laser beam if the cross-sectional ... (Read 28 times)

xroflmao

  • Hero Member
  • *****
  • Posts: 515
on: Jul 28, 2018
Determine the amount of energy carried in 50 m of a 3.5-mW He-Ne laser beam if the cross-sectional area of the beam is 5.0  10-6 m2.
 a. 2.9  108 J
  c. 0.024 J
  b. 5.8  1010 J
  d. 2.9  1010 J

Question 2

If two adjacent frequencies of an organ pipe closed at one end are 500 Hz and 700 Hz, what is the length of the organ pipe? (vsound = 340 m/s)
 a. 0.85 m
  c. 1.50 m
  b. 1.25 m
  d. 1.70 m


kmb352

  • Sr. Member
  • ****
  • Posts: 319
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Activation energy of a chemical reaction Activation energy of a chemical reaction
Laser for prostate surgery. Laser for prostate surgery.
Energy Transfer Energy Transfer
A Punnett square can be used to derive the F2 ratios in a cross from the F1 generation. A Punnett square can be used to derive the F2 ratios in a cross from the F1 generation.
The system moves at 1.50 2 m/s while the inclined planes are rough. a) Determine the ... The system moves at 1.50 2 m/s while the inclined planes are rough. a) Determine the ...
Test-Cross Results from Mendel’s Experiments Test-Cross Results from Mendel’s Experiments
Video: Fermentation pathways

For a complete list of videos, visit our video library