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PolarNik [594]
3 years ago
15

You could use an elevator or stairs to lift a box to the tenth floor. Which has greater energy? Why?

Physics
1 answer:
love history [14]3 years ago
6 0
Stairs because every step u take u use energy and the more steps the more energy
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Answer:

the correct one is D,  

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Explanation:

Electromagnetism radiation are waves of energy that is expressed by the Planck relationship

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where h is the plank constant and f the frequency of the radiation.

Also the speed of light is

          c = λ f

         

we substitute

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therefore to damage the cells of the body radiation of appreciable energy is needed

microwave radiation has an energy of 10⁻⁵ eV

infrared radiation                E = 10⁻² eV

visible radiation                   E = 1 to 3 eV

radiation Uv                         E = 3 to 6 eV

X-ray                                    E = 10 eV

 

gamma rays                         E = 10 5 eV

therefore we see that the high energy radiation is gamma rays, x-rays and ultraviolet light.

When checking the answers, the correct one is D

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