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11Alexandr11 [23.1K]
2 years ago
5

In science, a force is a push or a pull. is it true or false ?

Engineering
1 answer:
AysviL [449]2 years ago
8 0

Answer:

true

Explanation:

because it is a external agency which Change or tends to change the state of rest or uniform motion in a straight line

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to power devices  appliances and  some methods of transportation

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For a steel alloy it has been determined that a carburizing heat treatment of 15 h duration will raise the carbon concentration
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Answer:

135 hour

Explanation:

It is given that a carburizing heat treatment of 15 hour will raise the carbon concentration by 0.35 wt% at a point of 2 mm from the surface.

We have to find the time necessary to achieve the same concentration at a 6 mm position.

we know that \frac{x_1^2}{Dt}=constant where x is distance and t is time .As the temperature is constant so D will be also constant

So \frac{x_1^2}{t}=constant

then \frac{x_1^2}{t_1}=\frac{x_2^2}{t_2} we have given x_1=2 mm\ ,t_1=15 hour\ ,x_2=6\ mm and we have to find t_2 putting all these value in equation

\frac{2^2}{15}=\frac{6^2}{t_2}

so t_2=135\ hour

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3 years ago
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4. A series of steps engineers use to solve problems.

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