Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
?
?
Use this exhibit to answer the following question(s).
Refer to . The point at which the object has negative velocity and zero acceleration is
a.
A
b.
B
c.
C
d.
D
e.
E
c
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Two copper wires, one double the diameter of the other, have the same current flowing through them.If the thinner wire has a drift velocity v1, and the thicker wire has a drift velocity v2, how do the drift velocities of the charge carriers compare?
A. v1 = v2 B. v1 = 2 v2 C. 2 v1 = v2 D. v1 = 4 v2 E. 4 v1 = v2
The cosmic microwave background radiation was emitted during a time when ____ was the important process in the Universe
a. recombination b. ionization c. fusion d. antiproton production e. positron production
If an extrasolar planet suddenly became larger in radius, but kept the same mass and orbit, what would change in the observed Doppler shift of the star?
A) Nothing. The radius of a planet does not affect the Doppler shift. B) The time between peaks in the velocity of the star would decrease. C) The peak velocity of the star would be faster. D) The shape of the velocity curve would become less symmetric. E) The lowest velocity of the star would be slower.
The Jewish calendar is kept roughly synchronized with a solar calendar by
A) having a thirteenth month with 5 days each year. B) adding a thirteenth lunar month to 7 out of every 19 years. C) having the first lunar month begin on the spring equinox. D) skipping a month every 7 out of 19 years. E) having the first lunar month begin on the summer solstice.