Mass-Energy Equivalence
Physics ⇒ Modern Physics
Mass-Energy Equivalence starts at 11 and continues till grade 12.
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See sample questions for grade 11
A photon has zero rest mass. Does it have energy? Explain.
Describe a real-world application of mass-energy equivalence.
Describe how mass-energy equivalence is important in understanding the energy output of the Sun.
Describe the relationship between mass defect and binding energy in a nucleus.
Explain how mass-energy equivalence is demonstrated in particle-antiparticle annihilation.
Explain why nuclear reactions release much more energy than chemical reactions, using the concept of mass-energy equivalence.
Explain why the speed of light is squared in the mass-energy equivalence equation.
In the equation E = mc2, what does 'c' represent?
Which of the following best describes the significance of E = mc2? (1) Energy and mass are unrelated. (2) Mass can be converted into energy, and energy into mass. (3) Only energy can be converted into mass. (4) Mass and energy are both conserved separately.
Which of the following best explains why nuclear fusion in the Sun produces energy? (1) Mass is destroyed in the process. (2) A small amount of mass is converted into energy. (3) Energy is created from nothing. (4) The Sun loses no mass during fusion.
Which of the following is NOT a consequence of mass-energy equivalence? (1) Mass can be converted into energy. (2) Energy can be converted into mass. (3) Mass and energy are completely independent. (4) Nuclear reactions can release large amounts of energy.
Which of the following is NOT an example of mass-energy equivalence in action? (1) Nuclear fusion in stars (2) Chemical burning of coal (3) Particle-antiparticle annihilation (4) Nuclear fission in reactors
Fill in the blank: In E = mc2, E stands for ______.
Fill in the blank: The energy equivalent of 1 gram of mass is ______ joules. (c = 3.0 × 108 m/s)
Fill in the blank: The mass defect in a nucleus is responsible for its ______ energy.
Fill in the blank: The mass-energy equivalence equation shows that a small amount of mass can be converted into a ______ amount of energy.
True or False: According to mass-energy equivalence, mass can be converted into energy and vice versa.
True or False: The energy released in nuclear reactions comes from the conversion of mass into energy.
True or False: The mass of a nucleus is always less than the sum of the masses of its individual protons and neutrons.
True or False: The mass of a system always remains constant, regardless of energy changes.
