Compared with special relativity, general relativity is more concerned with

A) acceleration.
B) gravitation.
C) spacetime geometry.
D) all of the above
E) none of the above


Answer: D

Physics & Space Science

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The force exerted on the tires of a car to directly accelerate the car along a road is exerted by the

A) engine. B) tires. C) air. D) road. E) none of the above

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Consider a long straight coaxial cable consisting of a cylindrical conducting wire surrounded by an insulating layer surrounded by a concentric pipe-like conducting sheath. What kind of electric field would such a cable create if the inner wire had uniform charge per unit length?

A. Unidirectional B. Axial C. Radial D. None of the above

Physics & Space Science

Why do firemen use infrared cameras to look into smoke filled buildings?

A) The smoke itself gives off a lot of infrared light. B) They can avoid all the broken glass because glass is bright in infrared light. C) They can see through the smoke to look for people inside the room. D) They can see if there is anything radioactive in the room. E) They can tell if the smoke is toxic.

Physics & Space Science

A point charge Q = 7.00 × 10-9 C is placed at the origin of an xy-coordinate system. What is the electric field intensity E at a distance of x = 30 cm from this charge? (Use k = 9 × 109 Nm2/C2.)

A) 100 N/C B) 400 N/C C) 500 N/C D) 600 N/C E) 700 N/C

Physics & Space Science