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DerKrebs [107]
3 years ago
14

A television that is 83% efficient provides 4 600) of useful energy. How much energy

Physics
1 answer:
choli [55]3 years ago
4 0

Answer:

Total energy consume will be equal to 5542.175 j

Explanation:

We have given efficiency of the television is 83% = 0.83

Now it is given that useful energy is 4600 joule

We have to find the total energy consume

We know that efficiency is equal to ratio of  useful energy to total energy consume

So 0.83=\frac{4600}{total \ energy \ consume }

total energy consume =  5542.175

So total energy consume will be equal to 5542.175 J

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The definition of a light-year is the distance light travels in one year.
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Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 5.00 s, it rotates 13.9 rad. Du
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Answer:

(a) Angular acceleration is 1.112 rad/s².

(b) Average angular velocity is 2.78 rad/s .

Explanation:

The equation of motion in Rotational kinematics is:

θ = θ₀ + 0.5αt²

Here θ is angular displacement at time t, θ₀ is angular displacement at time t=0, t is time and α is constant angular acceleration.

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(b) The equation of average angular velocity is:

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3 years ago
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A magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the ind
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Answer:

A. Doubles.

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The mode of operation of a generator is that a metal core with copper tightly wound to it (conductor coil) rotates rapidly between the two (2) poles of a horseshoe magnet type. Thus when the conductor coil rotates rapidly, it cuts the magnetic field existing between the poles of the horseshoe magnet and then induces the flow of current.

When a high-resistance voltmeter is connected to an electric circuit, a deflection will arise due to the flow of electricity. Moving the magnet towards the coil of wire will cause the needle of the high-resistance voltmeter to move in one direction. Also, as the magnet is moved out from the coil of wire, the needle of the high-resistance voltmeter moves in the opposite direction.

In this scenario, a magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the induced voltage doubles because the number of turns (voltage) in the primary winding is directly proportional to the number of turns (voltage) in the secondary winding.

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