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masha68 [24]
3 years ago
12

An increase in a sound's pitch corresponds to an increase in what other property?

Physics
1 answer:
Wittaler [7]3 years ago
8 0
An increase in a sound's pitch corresponds to an increase in the frequency!
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A lamp is 10% efficient.How much electrical energy must be supplied to the lamp each second if it produces 20 J of light energy
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If it produces 20J of light energy in a second, then that 20J is the 10% of the supply that becomes useful output.

20 J/s = 10% of Supply

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<em>Supply = 200 J/s  </em>(200 watts)

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Use the eq. of Young modulus Y=(F/A)/(∆l/lo)
dimana ∆l is the elongation of wire, lo is its initial length.
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Use calculator to finish it.
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