Answer:
The power will be "250 watt". A further explanation is given below.
Explanation:
The given values are:
Force,
F = 50 N
Displacement,
d = 20 m
Time,
t = 2.0 seconds
Whenever the block is pulled, the angle will be "0" i.e., Cos0° = 1
Now,
The work will be:
= 
On substituting the given values, we get
= 
= 
= 
Now,
The Power will be:
= 
= 
= 
All electromagnetic waves travel in vacuum (space) at the speed of light (3 * 10^8 m/s). Radio waves is just a member of the electromagnetic spectrum. All electromagnetic waves follow the wave equation: speed = frequency * wavelength. With all electromagnetic waves, the speed in space is the same.
Work formula is Work=N∙M or Joule (J)
So you have the following given:
50 000 is the output work
.8 is the efficiency
if you input the given = 50000 = .8*J
To get the answer just divide 50000 by .8 to get the answer.
62,500 J is the amount of work to be done.
Answer: 4
Explanation:
when energy is greater then frequency should increase and wavelength should decrease.
Therefore answer is 4
