Nuclear Physics

Question 1

What are the two interpretations of E=MC^2

Answer 1

Mass can transform into energy, as in electron-positron annihilation. Energy has mass; moving objects have greater mass than at rest.

Question 2

What is mass defect

Answer 2

The difference between the mass of the completely separated nucleons and the mass of the nucleus.

Question 3

What is binding energy

Answer 3

The minimum energy required to completely separate a nucleus into its constituent protons and neutrons.

Question 4

What is induced fission

Answer 4

Induced fission is when a heavy atomic nucleus, such as uranium-235, absorbs a slow-moving neutron, becomes unstable, and subsequently splits into two daughter nuclei, releasing energy and 3 fast neutrons.

Question 5

What is the draw back to nuclear power

Answer 5

Releases harmful radioactive waste

Question 6

How does a fission reactor work

Answer 6

Fuel rods containing uranium are spaced evenly within a reactor core. A coolant, such as water, is used to remove the thermal energy produced by the fission into steam to turbines. A moderator is used to slow down the neutrons produced due to fission. A control rod is used to absorb the neutrons produced to ensure only one neutron remains per fission.

Question 7

How does fusion work

Answer 7

At high temperatures, nuclei move faster and can get close to each other to overcome the repulsive forces and fuse