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andre [41]
3 years ago
10

A geologist had two rocks on a scale that weighed 2 1/2 lbs together. Rock A was 1/7 of the total weight. How much did Rock A we

igh?
Mathematics
1 answer:
GenaCL600 [577]3 years ago
7 0
The total weight is 2 1/2 lbs

Rock A is 1/7 of the total weight....so it is 1/7 of 2 1/2 lbs..." of " means multiply

1/7 * 2 1/2 =
1/7 * 5/2 =
5/14 lbs <==
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The sound wave with a <u>frequency of 20</u> waves/sec is 800 longer than the wavelength of a sound wave with a <u>frequency of 16,000</u> waves/sec

<h3>Calculating wavelength </h3>

From the question, we are to determine how many times longer is the first sound wave compared to the second sound water

Using the formula,

v = fλ

∴ λ = v/f

Where v is the velocity

f is the frequency

and λ is the wavelength

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f = 20 waves/sec

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λ₁ = v/20

For the second wave

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λ₂ = v/16000

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The factor by which the first sound wave is longer than the second sound wave is

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= 16000/20

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Hence, the sound wave with a <u>frequency of 20</u> waves/sec is 800 longer than the wavelength of a sound wave with a <u>frequency of 16,000</u> waves/sec

Learn more on Calculating wavelength here: brainly.com/question/16396485

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