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BartSMP [9]
3 years ago
14

A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machi

ne?
Physics
2 answers:
Gemiola [76]3 years ago
5 0

Efficiency = (output power) / (input power)

                = (3,760 joule/sec) / (4,000 joule/sec)
 
               =    3,760 / 4,000  =  0.94  =  94%
 
777dan777 [17]3 years ago
5 0

your answer is 94 percent

i just took the test


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The electrical force on a 2-c charge is 60 n. the electric field where the charge is located is
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The electrical force acting on a charge q immersed in an electric field is equal to
F=qE
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E is the strength of the electric field

In our problem, the charge is q=2 C, and the force experienced by it is
F=60 N
so we can re-arrange the previous formula to find the intensity of the electric field at the point where the charge is located:
E= \frac{F}{q}= \frac{60 N}{2 C}=30 N/C
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A child in a boat throws a 5.80-kg package out horizontally with a speed of 10.0 m/s. The mass of the child is 24.6kg and the ma
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Answer:

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Explanation:

When the package is thrown out, momentum is conserved. The total momentum after is the same as the total momentum before, which is 0, since the boat was initially at rest.

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3 0
3 years ago
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2O POINTS!!! Easy Question. Will Mark Brainiest
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Answer: The Electrostatic force of attraction or repulsion between two charges shows that the Newton's third law applies to electrostatic forces.

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The electrostatic force exerted by charge 1 on charge 2 is.

By Coulomb's Law :

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The electrostatic force exerted by charge 2 on charge 1 is.

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negative sign shows that force are in opposite direction.

 

From Equation 1 and 2

              F1 = - F2

Which implies Newton Third law.

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