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marissa [1.9K]
3 years ago
7

a) An electric circuit is rates, 240V, 13Ω calculate the amount of current that can be used by this appliance.​

Physics
1 answer:
zaharov [31]3 years ago
5 0

Answer:

18.4615385 amps

Explanation:

The voltage V in volts (V) is equal to the current I in amps (A) times the resistance R in ohms (Ω):

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A long electric cable is suspended above the earth and carries a current of 345 A parallel to the surface of the earth. The eart
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A block is released to slide down a frictionless incline of 15∘ and then it encounters a frictional surface with a coefficient o
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The block's potential energy at the top of the incline (at a height h from the horizontal surface) is equal to its kinetic energy at the bottom of the incline, so that

mgh = 1/2 mv²

where v is its speed at the bottom of the incline. It follows that

v = √(2gh)

If the incline is 20.4 m long, that means the block has a starting height of

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and so the block attains a speed of

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The block then slides to a rest over a distance d. Kinetic friction exerts a magnitude F over this distance and performs an amount of work equal to Fd. By the work-energy theorem, this quantity is equal to the block's change in kinetic energy, so that

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Then the block slides a distance of

d = (-1293.58 J) / (-39.2 N) ≈ 32.9994 m ≈ 33 m

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3 years ago
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