2.7 Applications of conservation laws

• The three primary conservation laws are energy, momentum, and charge
• Momentum is a vector quantity that combines mass and velocity.

  True
• What does the conservation of energy state?

  Total energy remains constant
• Inelastic collisions conserve kinetic energy.

  False
• The conservation laws are satisfied in nuclear fission and fusion reactions.


  True
• Conservation laws in physics state that certain physical quantities remain constant in a closed system.
• The total electric charge in a closed system remains constant due to the conservation of charge.
• What does the conservation of energy state about energy in an isolated system?

  It remains constant
• What type of quantity is electric charge?

  Scalar quantity
• Nuclear fission satisfies the conservation laws of energy, momentum, and charge.

  True
• Pair production is an example where photons transform into oppositely charged particles.


  True
• Total energy includes kinetic and potential energy.

  True
• The key equation for conservation of momentum is \(\sum \vec{p}_{\text{initial}} = \sum \vec{p}_{\text{final}}\)
• The two main forms of energy are kinetic energy and potential
• Momentum is a scalar quantity.

  False
• What type of quantity is electric charge?

  Scalar
• Conservation laws help physicists predict outcomes in experiments.

  True
• In a bouncing ball, kinetic energy and potential energy are examples of energy transformation.


  True
• Conservation laws help predict and analyze particle interactions in physics.


  True
• The formula for kinetic energy is $\frac{1}{2}mv^{2}$, where \(m\) represents mass.
• A neutral atom has a net charge of zero.
• In what type of nuclear process does the energy of the parent nucleus equal the total energy of the decay products?

  Nuclear decay
• What do conservation laws in physics state?

  Physical quantities remain constant
• What remains constant according to the conservation of charge?

  Total electric charge
• Match the collision type with its properties:

  Elastic ↔️ Conservation of kinetic energy

  Inelastic ↔️ No conservation of kinetic energy
• In a closed system, energy can be converted between kinetic and potential forms, but the total energy remains constant.


  True
• The equation for conservation of momentum is \(\sum \vec{p}_{\text{initial}} = \sum \vec{p}_{\text{final}}\)
• The conservation of charge states that the total electric charge in a closed system remains constant
• What are conservation laws in physics primarily used for?

  Analyzing particle interactions
• What type of quantity is momentum?

  Vector quantity
• Order the collision types based on whether kinetic energy is conserved.

  1️⃣ Elastic collision

  2️⃣ Inelastic collision
• In an ideal pendulum, energy converts between kinetic and potential forms.


  True
• Particle colliders use the conservation of momentum to understand particle interactions.