Answer:
A)- SHORT WAVELENGTH AND LOW AMPLITUDE.
Explanation:
high pitch sound waves possess low wavelength and
quiet sound means that amplitue of the sound wave is low.
therefore option A matches the answer most.
Answer:
Explanation the third one for the second question
This question involves the concepts of charge and potential difference.
The net charge on the balloon is "2.6 x 10⁻⁸ C".
<h3>Net Charge on Balloon</h3>
The balloon has a shape of a sphere. Therefore, the formula for the charge on the surface of a sphere can be used here, as follows:
where,
- Q = net charge = ?
- r = radius of balloon = 15 cm = 0.15 m
- V = potential difference = 1560 V
- = permittivity of free space = 8.85 x 10⁻¹² C²/N.m²
Therefore,
Q = (4π)(8.85 x 10⁻¹² C²/N.m²)(0.15 m)(1560 V)
Q = 2.6 x 10⁻⁸ C = 26 nC
Learn more about charge here:
brainly.com/question/19886264
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