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xxTIMURxx [149]
3 years ago
5

A 1200 w microwave oven transforms 1.8x10(to the power of 5) J of energy while reheating some food. Calculate how long the food

was in the microwave, in mins!? (Please show steps, thanks)
Physics
1 answer:
Fofino [41]3 years ago
5 0

1200 watts = 1200 joules per second

(1.8 x 10⁵ joules) / (1,200 joules/sec) = 150 sec = <em>2.5 minutes


</em>
 
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White light contains seven colors, which are separated by the prism.

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It was first observed by Sir Issac Newton, that when white light is passed through a prism, an elongated, coloured patch of light is obtained on a screen placed behind the prism. The seven colours obtained constitute the spectrum of white light.

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3 years ago
(a) If a proton with a kinetic energy of 6.2 MeV is traveling in a particle accelerator in a circular orbit with a radius of 0.5
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The fraction of its energy that it radiates every second is 3.02\times10^{-11}.

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\dfrac{\dfrac{dE}{dt}}{E}=\dfrac{1.875\times10^{-4}}{6.2\times10^{6}}

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7 0
3 years ago
i)Distinguish between different methods of charging. ii) You are provided with a positively charged gold leaf electroscope. Stat
AleksAgata [21]

Answer:

Explanation:

On rubbing a glass rod with silk, the electrons from the glass rod get transferred to the silk. The silk now has an excess of electrons and so is negatively-charged. On the other hand, the glass rod is deficient in electrons and hence is positively-charged.

In the above case, the silk undergoes negative electrification.

Now, when the positively charged glass rod is touched on the disc of a negatively charged gold leaf electroscope, the electrons shifts towards rod, hence amount of charge on gold leaves decreases and the divergence between the gold leaves decreases as unlike charges attract each other.

Hence, the divergence decreases when a glass rod rubbed with silk is brought near the disc of negatively charged electroscope.

hope it helps pls mark me as brainliest

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