Mr. Andersen explains the concept of mass-energy equivalence, highlighting the law of conservation of energy. He uses the fission of uranium-235 as an example to demonstrate how mass can be converted into energy, releasing a significant amount of energy in the process. The video also covers how to calculate the energy released using Einstein's equation E=mc^2, with a detailed example involving atomic mass units and conversion to kilograms.

What is the fundamental principle that states energy remains constant in a system?

• Law of Conservation of Energy

• Law of Thermodynamics

• Law of Inertia

• Law of Motion

What happens when a neutron hits uranium-235?

• It releases electrons

• It turns into uranium-236 and undergoes fission

• It becomes stable

• It absorbs energy

How is energy from fission used in a nuclear reactor?

• To cool down the reactor

• To heat up water and produce steam for electricity

• To generate light

• To create magnetic fields

What is the standard atomic mass unit based on?

• Oxygen-16

• Nitrogen-14

• Hydrogen-1

• Carbon-12

What is the binding energy in an atomic nucleus?

• Energy absorbed by electrons

• Energy required to split the nucleus

• Energy holding the nucleus together

• Energy released during chemical reactions

What is the first step in calculating energy released in a fission reaction?

• Calculating the mass change

• Counting the number of neutrons

• Measuring the temperature

• Determining the speed of light

What is the conversion factor from atomic mass units to kilograms?

• 1.6605 x 10^-20 kg

• 1.6605 x 10^-30 kg

• 1.6605 x 10^-24 kg

• 1.6605 x 10^-27 kg

Why does the energy released in fission seem small initially?

• Because it is measured in joules

• Because it involves only a few atoms

• Because it is not visible

• Because it is absorbed by the environment

What is the significance of the speed of light in Einstein's equation?

• It determines the direction of energy

• It is a constant that relates mass and energy

• It measures the speed of particles

• It affects the temperature of reactions

How does the mass change in a fission reaction relate to energy?

• Mass is absorbed by the nucleus

• Mass is converted into energy

• Mass is lost as heat

• Mass remains constant