Understanding Energy in Physics

What is a common way scientists define energy?

• The ability to create matter

• The capacity for doing work

• The potential to generate heat

• The force exerted by an object

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Which of the following is NOT a type of energy mentioned in the video?

• Thermal

• Magnetic

• Nuclear

• Chemical

What is the formula for translational kinetic energy?

• 1/2 * m * v

• m * v^2

• 1/2 * m * v^2

• m * v

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What is potential energy typically associated with?

• Objects in a vacuum

• Objects at rest

• Objects in motion

• Objects moved against a force

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Who proposed the idea that energy was conserved and worked out the formula for gravitational potential energy?

• Émilie du Châtelet

• Gottfried Wilhelm Leibniz

• James Joule

• Isaac Newton

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Which scientist's work helped to appreciate and formalize the importance of energy?

• Émilie du Châtelet

• Isaac Newton

• Albert Einstein

• James Clerk Maxwell

What did Einstein show about mass and energy?

• They are unrelated

• They are equivalent and can be converted into each other

• Mass is always greater than energy

• Energy is always greater than mass

What is the primary source of mass in protons and neutrons?

• The motion and forces of nearly massless particles inside them

• The gravitational pull of the Earth

• The electromagnetic field

• The strong nuclear force alone

What happens to energy in an expanding universe?

• It fluctuates randomly

• It remains constant

• It decreases

• It increases

What did Emmy Noether realize about conservation laws?

• They are unrelated to the laws of nature

• They are always true regardless of conditions

• They only apply to kinetic energy

• They are a consequence of symmetries in the laws of nature

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