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Fantom [35]
2 years ago
9

PLEASE HELP ME! ALSO PLEASE EXPLAIN!

Mathematics
1 answer:
kobusy [5.1K]2 years ago
8 0

Answer:

c=13

Step-by-step explanation:

5^2+12^2=c^2

25+144=c^2

169=c^2

c=sqrt(169)

c=13

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Answer:

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Step-by-step explanation:

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A hairdryer transfers 36,000J in one minute, what is the power rating of the hairdryer?
Verdich [7]

Answer:

1. 600 watts

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3. 55%

4. 20 J

5. The cost of running the fire is 8p.

Step-by-step explanation:

1. Energy = 36 000 J , t = 1 minute = 60 seconds

Power = \frac{energy}{time}

           = \frac{36000}{60}

          = 600 watts

2. Power = \frac{work done}{time}

⇒ work done = Power × time

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3. Efficiency = (Output / Input) × 100

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4. Work done = Force × distance

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5. Given that 1 KWh cost 2p, Power = 4 KW and time = 4 hours.

  Power = \frac{energy}{time}

Energy = Power × time

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The cost of running the fire = \frac{16}{2}

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I just did it on edge 2021.

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