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The general theory of relativity describes gravity as

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A distortion of the shape of four-dimensional spacetime.

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Which of the following is not a prediction of general relativity?

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Gravity is slowing the rate of expansion of the universe

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The equivalence principle states that

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The effects of gravity are equivalent to the effects of acceleration.

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The path of an object through 4-dimensional spacetime is called its

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Worldline.

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What is the shape of the worldline of an object at rest, when time is plotted on the vertical axis?

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A vertical line.

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The circumference of a circle is less than 2 times Ο times the radius of the circle in a ________ geometry.

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Spherical

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In which overall shape of the universe is the universe finite?

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Spherical

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In general relativity, the orbital path of a planet

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- Is determined by the curved shape of spacetime that it is moving through.
- Never returns to the same point in four-dimensional spacetime.
- Is the straightest possible path through four-dimensional spacetime.
**Answer: All of the Above

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Far from a black hole, the curvature of spacetime

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Is the same as it would be at the same distance from a star with the same mass as the black hole.

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Identical clocks at sea level on Earth and at the top of Mount Everest will show

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Faster passage of time on top of Mount Everest

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How do spectral lines produced in a massive star's atmosphere compare with the same lines measured in a terrestrial laboratory (ignoring any motion)?

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The spectral lines from the star are at a longer wavelength.

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Einstein's general relativity successfully explained

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The rate of precession of Mercury.

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When light from a distant object passes near the Sun,

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Its path is deflected

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Gravitational waves are produced by

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None of the above

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The existence of wormholes would imply

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The possibility of time travel

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Einstein showed that

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Space and time cannot be separated

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If you are in a spaceship that is accelerating, and don't look out

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- You can still feel that you are accelerating
- You will feel as if you have weight

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If you are in a spaceship that is sitting on the surface of a planet, you feel your weight. How does this compare to the weight you feel in an accelerating spacecraft?

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Both are the same; they are indistinguishable.

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If you follow the straightest possible path through a spacetime diagram,

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You are in free fall - you do not feel any weight or acceleration

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According to general relativity, the presence of matter curves spacetime and therefore

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Time slows down in a gravitational field.