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loris [4]
3 years ago
12

A coal - fired power station produces 100MJ of electrical energy when it is supplied with 400MJ of energy from its fuel. The eff

iciency of the power station is ______
Physics
1 answer:
Alexus [3.1K]3 years ago
8 0

Answer:

100 divide by 400 times 100 percent

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Answer:

Maximum constant speed with which a car can round is 20.76 m/s.

Explanation:

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Therefore, maximum value of friction must be equal to centripetal force.

Therefore, \dfrac{mv^2}{r}=\mu_smg

Now, putting all given values and g = 9.8 \ m/s^2.

We get , \dfrac{v^2}{80}=0.55\times 9.8\\\\v^2=0.55 \times 9.8\times 80\\v=20.76\ m/s.

Hence, this is the required solution.

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saw5 [17]

Answer:

A) .27 A

Explanation:

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goldenfox [79]

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