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scoundrel [369]
2 years ago
11

Which of the following types of rocks are likely to be formed due to heat and pressure? Sedimentary rock only Metamorphic rock o

nly Both sedimentary rock and metamorphic rock Neither sedimentary rock nor metamorphic rock kill me
Physics
2 answers:
KiRa [710]2 years ago
6 0
It is metamorphic rock only
defon2 years ago
5 0

The answer is metamorphic rock ONLY because the only rock that is formed by heat and pressure is the metamorphic rock.

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A car travels at a steady 40.0 m/s around a horizontal curve of radius 200 m. What is the minimumcoefficient of static friction
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Answer:

c. 0.816

Explanation:

Let the mass of car be 'm' and coefficient of static friction be 'μ'.

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f=\mu N

As there is no vertical motion, therefore, N=mg. So,

f=\mu mg

Now, the centripetal force is provided by the frictional force. Therefore,

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Plug in the given values and solve for 'μ'. This gives,

\mu = \frac{(40\ m/s)^2}{200\ m\times 9.8\ m/s^2}\\\\\mu=\frac{1600\ m^2/s^2}{1960\ m^2/s^2}\\\\\mu=0.816

Therefore, option (c) is correct.

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