Answer:
Sound Intensity at microphone's position is 
The amount of energy impinging on the microphone is 
Solution:
As per the question:
Emitted Sound Power, 
Area of the microphone, 
Distance of microphone from the speaker, d = 52.0 m
Now, the intensity of sound, 
at a distance away from the souce of sound follows law of inverse square and is given as:
Now, the amount of sound energy impinging on the microphone is calculated as:
If be the Incident Energy/
Then
The amount of energy incident per 1.00 
is:
2. A phone is being charged using a current of 0.444 A.
If the resistance of the phone is 10 , what is the
voltage being applied to the phone?
Answer: Option (c) is the correct answer.
Explanation:
It is known that the expression for potential energy related to charges and distance between their separation is as follows.
where, 
and 
are two charges
r = distance of separation between the charges
k = electrostatic constant
So, when both the charges are carry the same charge and r is small then the value of potential energy will be positive in nature.
Whereas if the distance of separation between the charges is infinitely large then the potential energy calculated will be zero everywhere.
Thus, we can conclude that the statement one object is negatively charged and the other one is positively charged, is incorrect.
B. Bacteria
C.Earthworms
D. Humus
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