3 years ago

Perfect Elastic Collisions

Physics

1 answer:

ira [324]3 years ago

7 0

What is the quation?

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What is 6.9 × 107 written in standard form?

n200080 [17]

Answer: 6.9x 107 in standard form is 69,000,000

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3 years ago

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The frequency of sound wave A is 250 Hz. Find the time period.

olga2289 [7]

Time period = 1 / frequency
Time period = 1 / 250 th of a second

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3 years ago

Help !!

Vaselesa [24]

The answer is ; 6cm

Hope this helps!
Please give Brainliest!

This is because of the diagram below:

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2 years ago

A sound from a source has an intensity of 270 dB when it is 1 m from the source.

Rufina [12.5K]

Remember that sound intensity decreases in inverse proportion to the distance squared. So, to solve this we are going to use the inverse square formula: $\frac{I_{2} }{I_{1}}= (\frac{d{2} }{d_{1}})^2$
where
$I_{2}$ is the intensity at distance 2
$I_{1}$ is the intensity at distance 1
$d_{2}$ is distance 2
$d_{1}$ is distance 1

We can infer for our problem that $I_{1}=270$ , $d_{1}=1$ , and $d_{2}=3$ . Lets replace those values in our formula to find $I_{2}$ :
$\frac{I_{2} }{I_{1}}= (\frac{d{2} }{d_{1}})^2$
$\frac{I_{2} }{270} =( \frac{1}{3} )^2$
$\frac{I_{2} }{270} = \frac{1}{9}$
$I_{2}= \frac{270}{9}$
$I_{2}=30$ dB

We can conclude that the intensity of the sound when is <span>3 m from the source is 30 dB.</span>

8 0

3 years ago

How would decreasing the time it takes you to run a certain distance affect your speed?

morpeh [17]

You have it exactly backwards.

IN ORDER TO run a certain distance in less time,
you must increase your speed. That's the only way.

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3 years ago