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It is the distortion of the appearance of distant objects due to gravity and occurs because their light passes through regions of space that are curved.
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A) Gravity is the same thing as curvature of spacetime.
B) The effects of gravity are exactly equivalent to the effects of acceleration.
C) You cannot distinguish between motion at constant velocity and weight in a gravitational field.
D) The effects of relativity are exactly equivalent to those predicted by Newton's laws of motion.
E) All observers must always measure the same (equivalent) weights for moving objects.
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A) vertical.
B) horizontal.
C) slanted.
D) curved.
E) a circle.
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A) an object that cannot be seen
B) a place where light travels slower than the normal speed of light
C) a place where the strength of gravity is infinite
D) a hole in the observable universe
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False
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A) you will be weightless.
B) you will feel heavier than your normal weight.
C) you must be accelerating.
D) you must be traveling at constant velocity.
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It is the combination of space...View Answer
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A) Earth orbits the Sun because the mysterious force that we call gravity holds Earth in orbit.
B) Earth is following the straightest path possible through spacetime,but this path happens to go around and around the Sun.
C) Earth orbits the Sun because Earth and Sun are connected by a "rope-like" set of invisible,subatomic particles.
D) Earth orbits the Sun because a spacetime diagram shows the Sun to be a bowl-shaped dip in a rubber sheet.
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A) She is weightless because she is moving at constant velocity.
B) She is weightless because she is in a free-float frame.
C) She is weightless because she is in free-fall.
D) If you are in a gravitational field,then she cannot be weightless.
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A) It is the center of the black hole.
B) It is the "bottomless pit" of the black hole.
C) It is the place where time begins to slow down as you approach a black hole.
D) It is the boundary within which events in the black hole cannot influence events in the outside universe.
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A) vertical.
B) horizontal.
C) slanted.
D) curved.
E) a circle.
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A) there is less air traffic to contend with.
B) planes travel faster in cooler air.
C) the distance is shorter.
D) the plane can stay over the safety of land for longer.
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A) The orbit of a star system consisting of two neutron stars is slowly decaying,suggesting that energy is being carried away by gravitational waves.
B) The energy generated by gravitational waves from the Sun can be seen as it is absorbed by Jupiter.
C) Gravitational waves are frequently and easily detected by large telescopes.
D) Photographs of spacetime show the gravitational waves as ripples that are clearly visible.
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A) Mercury's orbit slowly precesses in a way that matches the prediction of general relativity but disagrees with the prediction based on Newton's universal law of gravitation.
B) Einstein discovered that time runs slower on Mercury than on Earth,as his theory predicted.
C) Einstein was able to explain the fact that Mercury orbits the Sun exactly twice for every three rotations,and Newton's theory of gravity cannot account for this.
D) We can see that Mercury lies deeper in the spacetime bowl that surrounds the Sun than does Earth.
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A) Newton's theory of gravity is now known to be false,and we were previously misled to think it was true by measurement errors.
B) Newton's theory of gravity and general relativity give the same answers,but the former tells us to think of gravity as a force and the latter tells us to think of gravity as curvature of spacetime.
C) Newton's theory of gravity is an approximation to general relativity that works when gravity is relatively weak,but breaks down when gravity is strong.
D) General relativity applies at the sub-atomic level,but Newton's theory of gravity does not.
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C
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A) Time is not affected by gravity.
B) Time is affected by gravity,but not in a predictable way.
C) Time is stopped by any gravitational field.
D) Time runs faster in stronger gravitational fields.
E) Time runs slower in stronger gravitational fields.
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A) It is another word for spacetime.
B) It is a space through which it is possible to travel very fast.
C) It is a space with a hyperbolic geometry.
D) Any space with more than three dimensions.
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