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Licemer1 [7]
3 years ago
15

Use this technique to find a formula for the intensity I of a sound, in terms of the sound level β and the reference intensity I

0. There will be a quantity (10 dB) involved in your calculations. When you enter your answer, leave off the unit dB.
Physics
1 answer:
denis23 [38]3 years ago
4 0

Answer:

I = I_o (10^{\frac{\beta}{10}})

Explanation:

As we know that sound level is given as

\beta = 10 Log (\frac{I}{I_o})

so here we have

\frac{\beta}{10} = Log(\frac{I}{I_o})

now we can take anti log both sides

10^{\frac{\beta}{10}} = \frac{I}{I_o}

so we have

I = I_o (10^{\frac{\beta}{10}})

so above is the expression for the intensity of sound in terms of reference intensity and sound level

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Answer:

D) 15 m/s

Explanation:

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If Steve throws the football 50 meters in 3 seconds, what is the average speed of the football? Speed = distance / time Question
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Answer:

A. 16.67 m/s

Explanation:

Speed or velocity refers to the rate of change in distance over a change in time. That is;

Speed = Distance ÷ time

Where;

Speed is in metre/seconds

Distance is in metre

Time is in seconds.

In this question, Steve throws a football 50 meters in 3 seconds. The average speed can be calculated this:

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3 years ago
A very small object carrying -7 μC of charge is attracted to a large, well-anchored, positively charged object. How much kinetic
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Answer:

ΔK.E = 14 nJ

Explanation:

Solution:

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- We will use conservation of energy on the system that contains the charged particle with charge q loses its electric potential energy U as it moves towards positively charged object that converts into a gain in Kinetic energy of the charged particle ΔK.E:

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                                 ΔK.E = (7*10^-6)*(2*10^-3)

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- The gain in kinetic energy is 14 nJ.

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