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4 years ago

How long would a 700-W microwave have to run to use the same energy as a 100-W light bulb left on for 35 min?

Physics

2 answers:

hodyreva [135]4 years ago

5 0

Answer:

The microwave will run for 5 minutes using the same energy as the bulb

Explanation:

Step one

Given data

Power for microwave =700-W

Power consumption for light bulb=100W

Time =35min----to hours 35/60=0.58hrs

Energy consumption for bulb =power *time

= 100*0.58

=58.33joule

If the microwave wave is to consume this same amount of energy then it will run for

Energy =power *time

Time =energy /power

Time =58.33/700

Time =0.083hrs to min=0.083*60

Time =5 minutes

lara31 [8.8K]4 years ago

4 0

The answer is 5 mins. If the energy spent by a 100 W bulb for 35 min is the product of 100 X 35 which equals to 3500. With the microwave it'll take just 5 mins to consume that. (3500/700)

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Explanation:

Given that,

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$E=\dfrac{6.63\times10^{-34}\times3\times10^{8}}{6.0\times10^{-15}}$

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Using formula of kinetic energy

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$E=6.709\times10^{-9}\ J$

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