Ptolemy's model of the universe
a. was heliocentric.
b. included elliptical orbits.
c. contained epicycles.
d. all of the above
e. none of the above
C
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Adding BCC elements such as vanadium to titanium _________the ?-phase transus.
Fill in the blank(s) with the appropriate word(s).
The further away a galaxy is:
A) the older it is. B) the further ahead in the future it will exist. C) the longer ago it existed. D) the larger it appears. E) the more massive it is.
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.
Consider a parallel-plate capacitor with a dielectric material between the plates. If the temperature of the dielectric increases, the capacitance
1.increase 2.decrease 3.remains the same