Where on the ecliptic is the vernal equinox located?
The vernal equinox is located on the celestial sphere where the Sun crosses the
celestial equator going from south to north.
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Which will melt more ice when placed on its surface, a kilogram of wood or a kilogram of iron of the same high temperature?
A) 1 kg of wood. B) 1 kg of iron. C) both the same D) neither of these
While a variety of factors can produce redshifts in the spectrum, the one associated with the expansion of the universe is called:
A) universal. B) cosmological. C) olberian. D) relativistic. E) the Zeeman Effect.
Two masses collide and stick together. Before the collision, one of the masses was at rest. Is there a situation in which the kinetic energy is conserved in such a collision?
a. Yes, if the less massive particle is the one initially at rest. b. Yes, if the more massive particle is the one initially at rest. c. Yes, if the two particles have the same mass. d. No, kinetic energy is always lost is such a collision.
A large ice cube containing an iron railroad spike floats in a brim-full container of water. When the ice cube melts,
A) water spills over. B) no change in water level occurs. C) water level in the container drops.