Understanding Mass Defect and Binding Energy

The video tutorial explains the concept of mass defect, using uranium-235 and carbon-12 as examples. It discusses how the mass of an atom's nucleus differs from the sum of its parts, leading to the concept of binding energy. The tutorial highlights Einstein's famous equation, E=mc², and its role in understanding mass-energy equivalence. It also covers the calculation of binding energy and the implications of mass-energy conversion, touching on Einstein's legacy in nuclear physics.

What is the primary force that holds protons together in the nucleus despite their repulsion?

• Weak nuclear force

• Gravitational force

• Electromagnetic force

• Strong nuclear force

Why is carbon-12 used as a standard in atomic mass units?

• It is the lightest element

• It has an equal number of protons and neutrons

• It is the most abundant element

• It has a mass of exactly 12 amu

What does Einstein's equation E=mc² imply about mass and energy?

• Mass and energy are unrelated

• Mass can be converted into energy

• Energy can be created from nothing

• Mass is always greater than energy

How is the mass defect related to the binding energy of an atom?

• Mass defect is unrelated to binding energy

• Mass defect is the energy required to break the nucleus

• Mass defect is the energy gained when forming the nucleus

• Mass defect is the energy lost when forming the nucleus

What is the significance of the number 931.5 in the context of binding energy?

• It is the speed of light in m/s

• It is the energy in joules per amu

• It is the energy in mega electron volts per amu

• It is the mass in grams per amu

What is the binding energy of carbon-12 in mega electron volts?

• 0.0955 MeV

• 931.5 MeV

• 12.00 MeV

• 89.03 MeV

Why is binding energy important in nuclear reactors?

• It determines the color of the reactor

• It increases the temperature of the reactor

• It affects the stability of the reactor

• It is unrelated to nuclear reactors

What role did Einstein play in the development of nuclear weapons?

• He urged the development of nuclear weapons during WWII

• He discovered the atomic bomb

• He invented nuclear weapons

• He opposed all nuclear research

How does binding energy relate to the stability of a nucleus?

• Lower binding energy means more stability

• Higher binding energy means less stability

• Higher binding energy means more stability

• Binding energy does not affect stability

What is the common misconception about Einstein's role in nuclear physics?

• He was solely responsible for nuclear weapons

• He discovered gravity

• He invented the periodic table

• He was against all scientific research