What is Energy?

What is energy described as in the context of physics?

• A type of matter

• A mystical influence

• A tangible substance

• A mathematical relationship

Who introduced the concept of gravitational potential energy?

• Thomas Young

• Isaac Newton

• James Prescott Joule

• Emily du Châtelet

What happens to energy in a perfectly elastic collision?

• It is lost as heat

• It is conserved

• It is converted to mass

• It disappears

What is a feature of a conservative force?

• Energy is conserved regardless of the path taken

• Energy is created

• Energy is lost over time

• Energy is only conserved in a vacuum

Which equation predicts the flow of fluids by conserving energy?

• Bernoulli's Equation

• Newton's Second Law

• Einstein's Field Equations

• Schrodinger's Equation

What does Lagrangian mechanics focus on?

• The destruction of energy

• The creation of energy

• The difference between kinetic and potential energy

• Tracking individual particles

What is the basis for high energy particle physics?

• Newtonian mechanics

• Lagrangian quantum field theory

• Thermodynamics

• Classical mechanics

What does Noether's theorem relate to?

• The creation of energy

• The destruction of energy

• Conservation laws and symmetries

• The speed of light

What is a consequence of the universe not being time symmetric?

• Energy is always conserved

• Energy is created from nothing

• Energy disappears completely

• Energy is not conserved on cosmic scales

In the context of general relativity, why is energy conservation generally invalid?

• Because energy is created

• Due to the potential time evolution of space

• Because energy is always conserved

• Due to the constancy of time