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

Author Question: The magnetic force between parallel wires is used by the National Bureau of Standards to define the ... (Read 47 times)

809779

  • Hero Member
  • *****
  • Posts: 579
on: Jul 27, 2018
The magnetic force between parallel wires is used by the National Bureau of Standards to define the
 
  A) Newton.
  B) Tesla.
  C) square-meter.
  D) Ampere.
  E) Coulomb.

Question 2

Why do large aperture telescopes use a mirror instead of a lens to focus light?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dominiqueenicolee

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

Large mirrors are much cheaper than lenses (the largest lens has a 1 m diameter) and mirrors have an added advantage of no chromatic aberration.


809779

  • Member
  • Posts: 579
Reply 2 on: Jul 27, 2018
Wow, this really help

milbourne11

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Rain forest in Pacific Rim National Park, Vancouver Island, British Columbia Rain forest in Pacific Rim National Park, Vancouver Island, British Columbia
A wolf on the hunt in Yellowstone National Park. A wolf on the hunt in Yellowstone National Park.
Earth’s Magnetic Field Earth’s Magnetic Field
(A) X-ray technician performs a mammogram. (National Cancer Institute/Creator: Alan Hoofring ... (A) X-ray technician performs a mammogram. (National Cancer Institute/Creator: Alan Hoofring ...
John Muir (right) with President Roosevelt at Yosemite National Park John Muir (right) with President Roosevelt at Yosemite National Park
Video: Prone Position

For a complete list of videos, visit our video library