Nuclear physics: decay, half-life and binding energy

Question 1 of 10

In a nuclear reactor, the moderator (such as graphite or water)

Question 2 of 10

Binding energy per nucleon is greatest for nuclei near

Question 3 of 10

A sample contains 4000 radioactive nuclei. After 3 half-lives, the number remaining is ___.

Question 4 of 10

A nucleus with more nucleons always has a higher binding energy per nucleon.

Question 5 of 10

A sample contains 1000 radioactive nuclei. After 2 half-lives, the number remaining is ___.

Question 6 of 10

How much energy is released when 0.001 kg of mass is converted to energy? (c = 3 × 10⁸ m/s)

Question 7 of 10

Mass defect is

Question 8 of 10

The count rate of a source falls from 640 to 160 counts/min in 20 minutes. Find its half-life.

Question 9 of 10

A chain reaction occurs when

Question 10 of 10

The strong nuclear force