Which of the following statements is not a prediction of the general theory of relativity?
A) Time runs slightly slower on the surface of the Sun than on the surface of Earth.
B) The Universe has no boundaries and no center.
C) The curvature of spacetime can distort the appearance of distant objects.
D) Different observers can disagree about the fundamental structure of spacetime.
E) A binary star system with two stars orbiting each other rapidly emits gravitational waves.
D
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Theoretical physicists have had the greatest success in combining which force with the electromagnetic force?
a. strong nuclear force b. weak nuclear force c. gravitational force d. the force caused by the exchange of gluons
A small car has a head-on collision with a large truck. Which of the following statements concerning the magnitude of the average force due to the collision is correct?
A) The truck experiences the greater average force. B) The small car experiences the greater average force. C) The small car and the truck experience the same average force. D) It is impossible to tell since the masses are not given. E) It is impossible to tell since the velocities are not given.
The focal lengths of the objective and eyepiece in a compound microscope are 0.8 cm and 2.5 cm, respectively. The image formed by the objective is 16 cm from it and the final image is 25 cm from the eye. What is the total magnification?
A) -19.0 B) -11.0 C) -2.0 D) -100 E) -200
The time interval during which a nucleus has a 50% probability of decaying is its _________
Fill in the blank(s) with correct word