Which of the following statements about the use of nuclear energy is true?
a. nuclear energy cannot be used safely.
b. nuclear fusion has no known useful applications.
c. nuclear fission is currently more useful for producing energy than nuclear fusion.
d. nuclear fusion has fewer safety risks than nuclear fission.

c) Nuclear fission is currently more useful for producing energy than nuclear fusion.

Explanation:

When a heavy nucleus splits into lighter nuclei, the process is nuclear fission. A lot of energy is released in a fission reaction.

A series of such fission reactions (called chain reactions) are used in nuclear power reactors for the generation of electricity.

When lighter nuclei combine to form a heavier nucleus, nuclear fusion is said to have happened. It requires very high temperature conditions. A fusion reaction is highly impossible to be done in a laboratory they require very high temperatures that are not possible to be achieved in a laboratory.or a reactor. It is true that there will not be the nuclear wastes hazard if at all a fusion reactor is a possibility.

0.11 m/s and 0.28 m/s should be correct