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photoshop1234 [79]
3 years ago
13

A machine can never be 100% efficient because some work is always lost due to which factor?

Physics
2 answers:
Pachacha [2.7K]3 years ago
8 0

Answer:

A. can never be efficient due to friction

Nataliya [291]3 years ago
5 0

HEY!!

Answer:

A. friction

Explanation:

Now if we obtain output work same as input energy then it is 100% efficient.

but this is only possible when we have no energy loss while it is not possible due to many reasons:

one of the main cause of energy loss is friction

A machine can never be 100% efficient because some work is always lost due to the lack of materials or equipment that would convert work by 100%. but so far, no machine has got 100% efficiency.

So when the machine are working there must be a friction between its working parts due to which the out-input energy is lost in different parts and hence we can never be 100% efficient machine.

HOPE IT HELPS!!

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Two objects are moving in the xy-plane. Object A has a mass of 3.2 kg and has a velocity = (2.3 m/s)i+ (4.2 m/s)j and object B h
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A vector quantity with both direction and magnitude is momentum. Kg m/s (kilogram meter per second) or N s serve as its units (newton second).

The total starting momentum of a system must match the entire final momentum of the system since momentum is a conserved quantity. The overall momentum does not change.

The total momentum of the system is defined as follows:

As momentum is vector quantity and vectors can be added, so, the momentum of a system is given by

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Also, we know that

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Thus,

P = Pₓ + P'

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P = 3.2 (2.3i + 4.2j) + 2.9 (-1.8i +2.7j)

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Learn more about the momentum here:

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To solve this problem it is necessary to use the concepts related to the Hall Effect and Drift velocity, that is, at the speed that an electron reaches due to a magnetic field.

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