Einstein's theory of relativity is based in part on which one of the following postulates?
a. Speed of light in a vacuum is same for all observers regardless of source velocity.
b. Energy is conserved only in elastic collisions.
c. Space and time are absolutes.
d. Mass and energy are equivalent.
A
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The Algol paradox is explained by considering
a. the degenerate nature of the hydrogen on the surface of the white dwarf. b. synchrotron radiation c. the rate of expansion of the shock wave inside the supernova. d. the rotation rate of a neutron star. e. mass transfer between the two stars in a binary system.
When does film boiling begin?
What will be an ideal response?
If work was done on an object, the object must have
A. experienced a frictional force. B. accelerated. C. changed its position. D. changed only its direction of motion.
The most prominent theory about spiral arms is called the _____
A) spiral quantum fluctuations B) spiral gravitational collapse C) spiral density wave theory D) spiral radiation theory