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3 years ago

5. How many kilowatt-hours of energy would be used by a 40 W bulb that runs for 10 hours every

Physics

1 answer:

Nady [450]3 years ago

6 0

Answer:

E = 0.4 kWh

Explanation:

Given that,

The power of a bulb, P = 40 W

Time, t = 10 hours

We need to find the energy used by the bulb. Let it is equal to E. So,

$E=P\times t\\\\E=40\times 10\\\\E=400\ W-h\\\\or\\\\E=0.4\ kWh$

So, 0.4 kWh of energy would be needed.

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2 years ago

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castortr0y [4]

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3 years ago

A person throws a baseball from height of 7 feet with an initial vertical velocity of 50 feet per second. Use the vertical motio

Gnoma [55]

Answer:

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Explanation:

It is given that,

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Where

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For the given condition, the equation becomes:

$h=-16t^2+50t+7$

When it hits the ground, h = 0

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6 0

2 years ago

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This object is located 13.0 cm to the left of the lens and the image forms at 20.8 cm to the right of the lens.

Alina [70]

Answer:

0.125 cm

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2 years ago

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3 years ago