3 years ago

1.)State which definition of power below is correct.

Physics

1 answer:

Natalija [7]3 years ago

6 0

kW, watts, kilowatts, W

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An electric light is plugged into a 120-V outlet. If the current in the bulb is 0.50 A, how much electrical energy does the bulb

ioda

Answer:

= 54,000 Joules or 54 kJ

Explanation:

Electrical energy is given by the formula;

E = VIt; where V is the potential difference in volts, I is the current and t is the time in seconds.

Therefore;

Electrical energy = 120 V × 0.50 A × 15 ×60 seconds

= 54,000 Joules

Thus; the electrical energy is 54,000 joules or 54 kJ

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What is the momentum of a 750 kg car traveling at a velocity of 25 m/s north?

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Answer:

18750 kg-m/s

Explanation:

Momentum = mass x velocity

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<span>Antimony I am pretty sure is one. </span>

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A 10 kg bowling ball sits at the top of a 10 m hill and then slides down its icy hillside.

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An airplane flies horizontally at constant speed in a straightline direction. Its state of motion is unchanging. In other words

Alex_Xolod [135]

Answer:

sum of all forces on the air plane must be ZERO

So both forces must be of same magnitude

Explanation:

As we know that airplane is moving with uniform speed is horizontal plane is a straight line

so the motion of the air plane is uniform without any acceleration

So we will have

$a = 0$

acceleration must be zero

now by Newton's law

$F_{net} = 0$

$F_1 + F_2 = 0$

so sum of all forces on the air plane must be ZERO

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3 years ago