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a_sh-v [17]
3 years ago
10

Meg goes swimming on a hot afternoon. When she comes out of the pool, her foot senses that the pavement is unbearably hot. Suppo

se Meg wants to apply the scientific method to discover reasons for the hot pavement. What is the next step she should take?
a)analyze the data
b)ask questions
c)communicate the results
d)make observations
Physics
2 answers:
liberstina [14]3 years ago
7 0
B) ask questions. Meg should ask a question first so she can learn more about why the pavement felt so unbearably.
GalinKa [24]3 years ago
7 0

Answer:

b) ask questions

Explanation:

Meg senses that pavement feels hot when she comes out of the pool. In order to discover the reason behind using scientific method, she should first formulate a question. Based on it should hypothesis and then design experiment to test the hypothesis. next step would be to make observations, collect data, analyze it and draw conclusions. The final step would be to communicate the results.

Thus, correct option is b.

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A Carnot engine operates with an efficiency of 26.0% when the temperature of its cold reservoir is 281 K. Assuming that the temp
VLD [36.1K]

Answer:

The temperature of cold reservoir should be 246.818 K for efficiency of 35%

Explanation:

In first case we have given efficiency of Carnot engine = 26 % = 0.26

Temperature of cold reservoir T_L=281K

We know that efficiency of Carnot engine is given by

\eta =1-\frac{T_L}{T_H}

0.26 =1-\frac{281}{T_H}

T_H=379.72K

For second Carnot engine efficiency is given as 35% = 0.35

And temperature of hot reservoir is same so T_H=379.72K

So 0.35=1-\frac{T_L}{379.72}

T_L=246.818K

So the temperature of cold reservoir should be 246.818 K for efficiency of 35%

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3 years ago
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Explanation:

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