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

Author Question: Early AM radios required very long antennae wires. FM antennae are often approximately a meter in ... (Read 97 times)

geoffrey

  • Hero Member
  • *****
  • Posts: 880
on: Jul 27, 2018
Early AM radios required very long antennae wires. FM antennae are often approximately a meter in size. Can you surmise why sensitive FM aerials are much smaller than those AM wires?
 
  What will be an ideal response?

Question 2

A string of linear density 6.00 g/m is under a tension of 180. N. What is the velocity of propagation of transverse waves along the string?
 
  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

mirabriestensky

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 27, 2018
Answer to Question 1

A sensitive aerial has a size related to the wave length of the radiation (e.g. , /2, /4). AM, having a frequency a thousand times lower than FM, has wavelengths a thousand times larger, and early radios required a very sensitive antenna, unlike modern radios which have enormous amplification capability.

Answer to Question 2

173. m/s


geoffrey

  • Member
  • Posts: 880
Reply 2 on: Jul 27, 2018
:D TYSM

shewald78

  • Member
  • Posts: 340
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

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 immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Historian James Merrell notes several errors in Benjamin West’s famous 1771 painting, William Penn’s Historian James Merrell notes several errors in Benjamin West’s famous 1771 painting, William Penn’s
A long, narrow cobbled street in Old San Juan. A long, narrow cobbled street in Old San Juan.
Offshore spawning stock biomass, Grand Bank Atlantic Cod since the early 1980s Offshore spawning stock biomass, Grand Bank Atlantic Cod since the early 1980s
The striking improvements in motor development in the early months The striking improvements in motor development in the early months
Long-term relationships, especially those who are married, having a child Long-term relationships, especially those who are married, having a child
If you are able to earn 6.2% compounded semi-annually in an account, how long will it take for ... If you are able to earn 6.2% compounded semi-annually in an account, how long will it take for ...
Video: Hypoglycemia Animation

For a complete list of videos, visit our video library