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KengaRu [80]
2 years ago
9

If a 75 W lightbulb is 15% efficient, how many joules of light energy does the bulb produce every minute?

Physics
1 answer:
stiks02 [169]2 years ago
4 0

Answer:

1 W = 1 J / sec       Definition of watt is 1 joule / sec

So if a bulb uses 75 J / sec it must use

75 J/s * 60 sec / min = 4500 J/min    energy used by bulb

If bulb is 15% efficient then the light delivered is

P = 4500 J / min * .15 = 675 J / min

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How can u tell matched forces act on objects?
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2 years ago
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geniusboy [140]

Answer:

p = 4000 kg-m/s

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3 years ago
75kg man climbs a mountain 1000m high in 3hrs and uses 4100 joulse/min. (a) calculate the power consumption in watt, (b) what is
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Answer:

Explanation:

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t  = 0.527 s

<u>It accelerates for 0.527 s.</u>

<u>Explanation:</u>

We use the formula:

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Given:

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So applying the formula,

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106 = 0 + 201t

t     = 106/201

t     = 0.527 s

4 0
3 years ago
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