3 years ago

Which of the following is a chemical change

Physics

2 answers:

alina1380 [7]3 years ago

5 0

What are the options u can't say that and expect me to know wat u talkin bout

mel-nik [20]3 years ago

5 0

I'm guessing the answer choices are:

A. ice melting

B. ice being carved

C. water boiling

D. water breaking down into hydrogen and oxygen

The answer, if any of these choices, would be C

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The value of resistance when power is 1100 watts = $R_{2}$ = 50 ohms

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Power $P_{1}$ = 2200 Watts

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Resistance $R_{2}$ = we have to calculate

Given that the power in an electric circuit varies inversely with the resistance

⇒ P ∝ $\frac{1}{R}$

⇒ $\frac{P_{2} }{P_{1} }$ = $\frac{R_{1} }{R_{2} }$

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This is the value of resistance when power is 1100 watts.

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