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yulyashka [42]
3 years ago
12

What happens to metal railroad tracks during the heat of a summer day

Physics
2 answers:
Oksanka [162]3 years ago
4 0
The railroad tracks will expand because the heat waves make them bigger

lorasvet [3.4K]3 years ago
4 0
The heat could make the rails expand or even rust if there was some wind.
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humans? i believe it would be because we're mammals.

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By what factor must the amplitude of a sound wave be decreased in order to decrease the intensity by a factor of 2?
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I believe that the answer to the question asked  above is the following

sound intensity = sound power / (4 pi R2<span>)
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Plsss help I don’t understand this
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B is the correct option.

1. Given eqn;

S(t) = 1/2t² - 4t + 8

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<u>d(S(t))</u> = t - 4

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When distance, S, is differentiated it results to velocity.

V = t - 4

at t = 10

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6 0
2 years ago
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A 1.00-kg sample of steam at 100.0 °C condenses to water at 100.0 °C. What is the entropy change of the sample if the latent hea
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Answer:

The entropy change of the sample of water =  6.059 x 10³ J/K.mol

Explanation:

Entropy: Entropy can be defined as the measure of the degree of disorder or randomness of a substance. The S.I unit of Entropy is J/K.mol

Mathematically, entropy is expressed as

ΔS = ΔH/T....................... Equation 1

Where ΔH = heat absorbed or evolved, T = absolute temperature.

<em>Given:  If 1 mole of water = 0.0018 kg,</em>

<em>ΔH = latent heat × mass = 2.26 x 10⁶ × 1 = 2.26x 10⁶ J.</em>

<em>T = 100 °C = (100+273)  K = 373 K.</em>

<em>Substituting these values into equation 1,</em>

<em>ΔS =2.26x 10⁶/373</em>

ΔS = 6.059 x 10³ J/K.mol

Therefore the entropy change of the sample of water =  6.059 x 10³ J/K.mol

7 0
3 years ago
HURRY! PLEASE HELP!!!!<br><br><br> 3. What methods are you using to test this (or each) hypothesis?
Pie

Answer:

How to Test Hypotheses

State the hypotheses. Every hypothesis test requires the analyst to state a null hypothesis and an alternative hypothesis. ...

Formulate an analysis plan. The analysis plan describes how to use sample data to accept or reject the null hypothesis. ...

Analyze sample data. ...

Interpret the results.

4 0
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