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weqwewe [10]
3 years ago
15

The sound level measured in a room by a person watching a movie on a home theater system varies from 40 dB during a quiet part t

o 80 dB during a loud part. Approximately how many times louder is the latter sound
Physics
1 answer:
UNO [17]3 years ago
7 0

Answer:

\alpha=-3.01dB

Explanation:

From the question we are told that:

Sound level intensity

 \triangle I=40dB-80dB

Generally the equation for  intensity level  is mathematically given by

 \alpha=10log_{10}(I/I_x)dB

Where

 I= Intensity measured

 I_x=Threshold\ of\ audibility

 I_x= 10-12 W / m2

 \alpha= 10 log10 \frac{I_1}{I_x} - 10 log10 \frac{}I_2{I_x}

 \alpha= 10 log10 \frac{I_1}{I_2}

 \alpha=10 log10\frac{40}{80}

 \alpha=-3.01dB

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Hanging from a horizontal beam are nine simple pendulums of the following lengths:
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Answer:

Options d and e

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when  ω= 4rad/sec

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L=0.6125m

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This means only pendulum lengths in this range will oscillate.Therefore pendulums with length 0.8m and 1.2m will be strongly set in motion.

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8 0
3 years ago
After observing a moth that is camouflaged against dark-colored bark, a scientist asks a question. The scientist discovers that
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