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Kipish [7]
3 years ago
14

How much energy is wasted if a 100 W device is left on for 20 hours

Physics
1 answer:
Sladkaya [172]3 years ago
4 0

Answer:

100 watts x 10 hours = 1,000 watt‐hours = 1 kWh

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A 9 v battery causes a current of 0.45 a through a resistor. (a) what is its resistance? (b) how many joules of energy does the
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\displaystyle I = \dfrac{u}{R} \Rightarrow R = \dfrac{u}{I} = \dfrac{9 \ V}{0.45 \ A}  = 20 \ \Omega. \newline
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Answer:

Distance s  = 90 meter

Explanation:

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