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 25 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
Great answer, keep it coming :)

rachel

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Four cheetahs at Serengeti National Park, Tanzania Four cheetahs at Serengeti National Park, Tanzania
Torque is a twisting force equal to the distance from the pivot point times the force applied ... Torque is a twisting force equal to the distance from the pivot point times the force applied ...
A mother Eastern Grey Kangaroo (Macropus giganteus) with her joey feeds in Murramarang National Park A mother Eastern Grey Kangaroo (Macropus giganteus) with her joey feeds in Murramarang National Park
Video: Mutations and translation

For a complete list of videos, visit our video library