Answer: what does a,b,c stand for?
Explanation:
The amplitude determines the volume of the sound. This isn't affected by the motion of the sound source.
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Use the following formula for the electric field strength between two parallel plates:
E = V/d
where,
V: potential difference = 25V
d: distance between plates = 5 cm = 0.05 m
Replace the previous values of the parameters into the formula for E:

Hence, the electric field strength is 500V/m
Explanation:
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