Which of the following correctly describes the relationship between Newton's theory of gravity and general relativity?

A) 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.
B) Newton's theory of gravity is now known to be false, and we were previously misled to think it was true by measurement errors.
C) 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.
D) General relativity applies at the subatomic level, but Newton's theory of gravity does not.


A) 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.

Physics & Space Science

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The intensity of a sound wave is directly proportional to

A. the frequency. B. the amplitude. C. the square of the amplitude. D. the square of the speed of sound. E. none of these answers are correct

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Identical balls oscillate with the same period T on Earth. Ball A is attached to an ideal spring and ball B swings back and forth to form a simple pendulum. These systems are now taken to the Moon, where g = 1.6 m/s2, and set into oscillation

Which of the following statements about these systems are true? (There could be more than one correct choice.) A) Both systems will have the same period on the Moon as on Earth. B) On the Moon, ball A will take longer to complete one cycle than ball B. C) On the Moon, ball B will take longer to complete one cycle than ball A. D) On the Moon, ball A will execute more vibrations each minute than ball B. E) On the Moon, ball B will execute more vibrations each minute than ball A.

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What information is available that can allow people to give quantitative measures of climate in earlier times? Give examples

What will be an ideal response?

Physics & Space Science

Carbon dioxide solidifies at 195 K. Express this temperature in degrees Fahrenheit

A) -78°F B) -40°F C) -109°F D) -163°F E) -351°F

Physics & Space Science