Mass Energy Equivalence

In the equation E = mc² what does the E stand for?

• energy

• efficiency

• exertion

• endurance

Tags

NGSS.HS-PS3-2

In the equation E = mc² what does the variable C represent?

• change

• compression

• speed of light

• speed of sound

What is an example of mass converting to energy?

• a car running on gasoline

• a battery powering a flashlight

• a person lifting a heavy object

• nuclear power plant generating electricity

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

What is an important difference of classical and modern physics as it relates to mass and energy?

• Classical physics is concerned only with macroscopic objects, while modern physics deals with subatomic particles

• In classical physics, mass and energy are both measured in the same units, while in modern physics, they are measured in different units

• In classical physics, mass is conserved while energy is not, but in modern physics, both mass and energy are conserved

• Modern physicists think of mass as a type of energy. The total mass and energy of a system remains unchanged.

Who created the equation E = mc²?

• Niels Bohr

• Albert Einstein

• Isaac Newton

• Galileo Galilei

What is E = mc² also known as?

• Law of Conservation of Energy

• Coulomb's Law

• Mass-energy equivalence

• Zeroth's Law

What is the energy in the equation E = mc² also known as? rest-mass energy of any particle.

• kinetic energy

• potential energy

• thermal energy

• rest-mass energy

One gram of any substance has a rest-mass energy of _____?

• 9 x 10¹³ J

• 9¹³ J

• 9000 J

• 9 x 10^-13

Why can't we access the large rest-mass energy inherent in all particles?

• only accessible in highly controlled laboratory conditions

• too dangerous to harness

• rest-mass energy of particles is a theoretical concept and cannot be observed in the real world

• most of the atoms in the world around us are very stable

The difference between the mass of the atom and the sum of the masses of its parts is called the _______.

• mass-defect

• electron affinity

• isotope

• fission paradox