Ans: Beat frequency = = 4HzExplanation: The beat frequency is equal to the absolute value of the difference in frequency of the two waves. In other words, the number of beats per second is equal to the difference in frequency. It is due to the destructive and constructive interference. <span>According to this interference, sound will be soft or loud.
Hence. the formula is:
</span>Beat frequency =
<span>
Since,
</span>
Therefore,
Beat frequency =
=> Beat frequency =
-i
The ball is in free fall when its coming towards the ground
Answer:
The separation between the two point charges is decreased by a factor of .
Explanation:
By Coulomb's Law, the electric force () is inversely proportional to the square of separation (), that is:
(1)
If we know that , then the factor associated with separation between point charges is:
The separation between the two point charges is decreased by a factor of .
Answer:
a) t = 22.5 seconds
b)
c) in the same direction of the car.
Explanation:
First of all, let's convert the speed of the car to m/s:
Now, since the police officer catches the car, we know that their position is the same 750m, so:
Solving for t, we get:
t=22.5s Solved part a)
For the acceleration:
Replacing values and solving for a:
Solved part b)
For the velocity:
Solved part c)
The Sun shines on the moon which then shines back on the earth. Also the stars but thats very minimal