« previous next »

Author Question: A very small source of light that radiates uniformly in all directions produces an electric field ... (Read 67 times)

cnetterville

  • Hero Member
  • *****
  • Posts: 547
on: Jul 29, 2018
A very small source of light that radiates uniformly in all directions produces an electric field amplitude of 2.96 V/m at a point 33.0 m from the source.
 
  What is the power output from the source? (c = 3.00  108 m/s, 0 = 4  10-7 T  m/A, 0 = 8.85  10-12 C2/N  m2)

Question 2

A bridge piling has a cross-sectional area of 1.250 m2 and supports a load of 1875 N. What is the stress on the column?
 
  A) 1875 N
  B) 1875 N/m2
  C) 1500 N/m2
  D) 2344 N/m2


bobsmith

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jul 29, 2018
Answer to Question 1

159 W

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

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

Did you know?

The average adult has about 21 square feet of skin.

Medial and lateral directions Medial and lateral directions
effect of light on plant effect of light on plant
Using a black light to spot leaks after adding dye to the oil. Using a black light to spot leaks after adding dye to the oil.
Vitamins Absorbing in the small intestine Vitamins Absorbing in the small intestine
(a) Chromosome painting with five different-colored markers in a normal cell. (b) Painting produces (a) Chromosome painting with five different-colored markers in a normal cell. (b) Painting produces
Genetic Drift in Large and Small Populations Genetic Drift in Large and Small Populations
Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

For a complete list of videos, visit our video library