Mass and Energy Equivalence (VCE SSCE Physics): Quizzes

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Mass and Energy Equivalence
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How much mass does the Sun lose per second due to light energy emission?

Four billion kilograms

What is the formula for rest energy?

E0=mc2E_0 = mc^2

Why does a tiny mass correspond to a huge amount of energy?

c2c^2 is an enormous number (~9×10169\times10^{16})

When should you use relativistic formulas instead of classical ones?

When v>0.1cv > 0.1c (>10% of light speed)

What happens to the Lorentz factor γ\gamma as velocity approaches the speed of light?

It approaches infinity

What is nuclear fusion?

Joining small nuclei to form larger nuclei

What does mass defect (Δm\Delta m) represent in nuclear reactions?

Difference between reactant and product mass

What is the charge of a positron?

+1.6×1019+1.6 \times 10^{-19} C

What is produced when a positron and electron annihilate at low speeds?

Two gamma rays in opposite directions

Where was gold successfully created from bismuth using nuclear transmutation?

Lawrence Berkeley National Laboratory (LBNL)

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