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Lesson: Nuclear Binding Energy and Nuclear Reactions

Sample Question Videos

Worksheet • 15 Questions • 1 Video

Q1:

A supernova explosion of a 2 . 0 0 × 1 0 3 1 kg star produces 1 . 0 0 × 1 0 4 4 J of energy.

How many kilograms of mass are converted to energy in the explosion?

  • A 1 . 1 1 × 1 0 2 7 kg
  • B 3 . 3 3 × 1 0 2 7 kg
  • C 3 . 7 0 × 1 0 2 6 kg
  • D 1 . 3 3 × 1 0 2 7 kg
  • E 7 . 1 1 × 1 0 2 6 kg

What is the ratio Δ 𝑚 / 𝑚 of mass destroyed to the original mass of the star?

  • A 5 . 5 6 × 1 0 1 5
  • B 6 . 3 5 × 1 0 1 5
  • C 2 . 3 2 × 1 0 1 5
  • D 4 . 0 5 × 1 0 1 5
  • E 3 . 2 8 × 1 0 1 5

Q2:

The electrical power output of a large nuclear reactor facility is 900 MW. It has a 3 5 . 0 % efficiency in converting heat released by nuclear reactions to electrical energy.

What is the thermal power output?

  • A 2 . 5 7 × 1 0 3 MW
  • B 2 . 7 0 × 1 0 3 MW
  • C 2 . 1 2 × 1 0 3 MW
  • D 2 . 4 1 × 1 0 3 MW
  • E 2 . 2 8 × 1 0 3 MW

How many 2 3 5 U nuclei undergo fission each second, assuming that the average energy released per fission is 200 MeV?

  • A 8 . 0 4 × 1 0 1 9
  • B 1 . 1 2 × 1 0 2 0
  • C 8 . 8 5 × 1 0 1 9
  • D 1 . 0 6 × 1 0 2 0
  • E 9 . 7 8 × 1 0 1 9

What mass of 2 3 5 U is fissioned in 1 year of full-power operation?

  • A 991 kg
  • B 830 kg
  • C 449 kg
  • D 772 kg
  • E 603 kg

Q3:

The power output of the Sun is 4 × 1 0 2 6 W. 9 0 % of the Sun’s energy output is supplied by proton-proton chain reactions.

If a proton-proton chain reaction produces 26.7 MeV from the fusion of four protons into a helium nucleus, how many protons are consumed per second?

  • A 3 × 1 0 3 8
  • B 1 0 3 9
  • C 1 0 3 8
  • D 8 × 1 0 3 8
  • E 5 × 1 0 3 8

If a proton-proton chain reaction produces two neutrinos, how many neutrinos per second should there be per square meter at the surface of Earth from this process?

  • A 6 × 1 0 1 4
  • B 2 × 1 0 1 5
  • C 2 × 1 0 1 4
  • D 1 0 1 5
  • E 8 × 1 0 1 4
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