Module 4 Lesson 6

25 July 2022
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question
Which of the following statements correctly describes the law of conservation of energy
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The total quantity of energy in the universe never changes
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which of the following is not conserved quantity
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acceleration
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The energy attributed to an object by virtue of its motion is known as
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kinetic energy
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Radiative energy is
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energy carried by light
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The energy stored is called
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the potential energy
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Gasoline is useful in cars because it has
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chemical potential energy
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Where does the energy come from that your body uses to keep you alive
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it comes from the foods you eat
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What does temperature measure
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the average kinetic energy of particles in a substance
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Which of the following has the highest temperature
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the air heated to 400Β° Fahrenheit inside an oven
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which of the following has a greatest amount of thermal energy
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an iceberg
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In the formula E=mc^2, what does E represent
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the mass-energy, or potential energy stored in an object's mass
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Considering Einstein's famous equation, E = mc2, which of the following statements is true?
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a small amount of mass can be turned into a large amount of energy
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When a rock is held above the ground, we say it has some potential energy. When we let it go, it falls and we say the potential energy is converted to kinetic energy. Finally, the rock hits the ground. What has happened to the energy?
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the energy goes to producing sound and to heating the ground, rock, and surrounding air
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Suppose you kick a soccer ball straight up to a height of 10 meters. Which of the following is true about the gravitational potential energy of the ball during its flight?
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the ball's gravitational potential energy is greatest at the instant when the ball is at its highest point
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The amount of gravitational potential energy released as an object falls depends on
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its mass and the distance it falls
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A skater can spin faster by pulling her arms closer to her body or spin slower by spreading her arms out from her body. This is due to
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conservation of angular momentum
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Suppose the Sun were suddenly to shrink in size but that its mass remained the same. According to the law of conservation of angular momentum, what would happen?
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the sun would rotate faster than it does now
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According to what we know from Newton's laws, which of the following best explains why Kepler's second law is true
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a planet's angular momentum is conserved as it moves around its orbit
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Noether's theorem explains the fundamental connection between the symmetries in nature and the conservation laws. It states that for every symmetry that an environment has, there is a corresponding conserved quantity. Which of the following statements are true?
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Noether's theorem tells us that the laws of physics are unchanging in time and space. Noether's theorem tells us that the conservation of energy is the result of symmetry in time. Noether's theorem tells us that the laws of physics are the same regardless of when we do an experiment. Noether's theorem tells us that the conservation of momentum and angular momentum are the result of symmetry in space.
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Which of the following statements are true?
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an object accelerated to a great speed gains kinetic energy a mass raised to a great height gains a lot of gravitational potential energy When you heat up a pot of water, you increase its thermal energy
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Which of the following statements are true?
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total energy is always conserved energy can be transformed from one form to another and transferred from one object to another, but it can be neither created nor destroyed
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Which of the following statements are true?
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a spinning planet will maintain its angular momentum a planet orbiting a star will maintain its orbital angular momentum a planet orbiting a star will maintain its orbital energy