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In our universe, the rest energy of an electron is approximately8.2×10-14J. What would it be in the alternate universe?
(a)8.2×10-8J; (b)8.2×10-26J; (c)8.2×10-2J; (d) 0.82J.

Short Answer

Expert verified

The energy is8.2×10-26J .Hence, B is the correct option.

Step by step solution

01

Important Concepts

Rest energy of an object is given by

E=mc2

Where m is the rest mass and c is speed of light.

02

Application

The rest energy of the object is given by

E=mc2

Where is the speed of light in alternate universe.

Multiply and divide by the speed of light get,

E=mc2cc2

We know thatE=mc2=8.2×10-14J

Input these values we get

E=8.2×10-14J300m/s3×108m/s2E=8.2×10-26J

Therefore, the energy is8.2×10-26J .Hence, B is the correct option.

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