Mass-Energy Equivalence and Applications

Mr. Andersen explains the concept of mass-energy equivalence using Einstein's equation E=mc². He discusses how energy can be converted into mass and vice versa, using examples like atomic explosions and the Grand Cooley Dam. The video introduces special relativity and explains how energy is measured in joules, using practical examples like lifting an apple. Finally, it demonstrates the energy potential in mass through a calculation involving an apple, highlighting the vast energy stored in matter.

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

• Mass is always greater than energy.

• They are unrelated.

• Energy is always greater than mass.

• They are equivalent and can be converted into each other.

What is the significance of the speed of light in the equation E=mc²?

• It shows that a small amount of mass can produce a large amount of energy.

• It only applies to light energy.

• It is irrelevant to the equation.

• It limits the amount of energy that can be produced.

In the first atomic explosion, what happened to 1 gram of matter?

• It was converted into energy.

• It was converted into water.

• It was converted into sound.

• It was converted into light.

What is the main concept of special relativity discussed in the video?

• Mass and energy are unrelated.

• Mass and energy can be converted into each other.

• Mass is always constant.

• Energy is always constant.

How is energy measured in the context of physics?

• In watts

• In kilograms

• In joules

• In meters

What is a joule equivalent to?

• A meter per second

• A newton meter

• A watt per second

• A kilogram meter

How much energy is in a 60-watt light bulb?

• Enough to lift 60 apples a meter every second

• Enough to lift 5 apples a meter every second

• Enough to lift 30 apples a meter every second

• Enough to lift 10 apples a meter every second

What is the mass of an average apple used in the energy calculation?

• 0.20 kilograms

• 0.15 kilograms

• 0.25 kilograms

• 0.10 kilograms

How much energy is contained in the mass of an apple according to Einstein's equation?

• 14 million joules

• 14 trillion joules

• 14 quadrillion joules

• 14 billion joules

What future technology might harness energy from mass without negative consequences?

• Wind turbines

• Fusion reactors

• Solar panels

• Hydroelectric dams