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viktelen [127]
3 years ago
9

An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the

Physics
1 answer:
andrew-mc [135]3 years ago
8 0

Answer:

50 W

Explanation:

Case 1

Power = V * I

100 = 220 * I

I = \frac{100}{220} A

Case 2

P = V * I

P = 110 * \frac{100}{220}

P = 50 W

I think the answer is 50 W

Hope it helps

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This would be Newton’s first law :)
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Newtons third law says that if Robert exerts a _______ of 1000 Newtons on an object, it will exert an equal and opposite _______
Free_Kalibri [48]

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Explanation:

Newton’s third law states that there is an equal and opposite force

I took the test too

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A sample of an unknown substance has a mass of 89.5 g. If 345.2 J of heat are required to heat the substance from 285 K to 305 K
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Strontium 3890Sr has a half-life of 28.5 yr. It is chemically similar to calcium, enters the body through the food chain, and co
patriot [66]

Answer:

Thus the time taken is calculated as 387.69 years

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As per the question:

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Now,

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By using the formula:

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where

N = No. of nuclei left after time t

N_{o} = No. of nuclei initially started with

\frac{N}{N_{o}} = 1\times 10^{- 4}

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Thus

1\times 10^{- 4} = (\frac{1}{2})^{\frac{t}{28.5}}}

Taking log on both the sides:

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5 0
3 years ago
A cross-country skier can complete a 7.5 km race in 45 min. What is the skier’s average speed?
kap26 [50]

Answer:

Speed = 10 km/hr

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Speed = Distance / Time

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Therefore,

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           = <u>10 km/hr </u>

<u></u>

<u>Hope it helps!</u>

3 0
3 years ago
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