The most famous G type star is:
A) Polaris.
B) Betelguese.
C) Sirius.
D) the Sun.
E) Pollux.
D
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If a lake is about an eighth covered by water hyacinths when you first look at it, and completely covered 3 weeks later, what is the water hyacinth doubling time?
a. 0.25 week b. 0.5 week c. 1 week d. 2 weeks e. 3 weeks
In a Young's double-slit experiment, how many maxima occur between the 5th-order maxima?
a. 8 b. 9 c. 10 d. 25 e. Three more than the number of minima.
Compared to life on Europa, if life exists on Ganymede it will probably be
A) less abundant and less evolved B) more abundant and more evolved C) less abundant but more evolved D) more abundant but less evolved
A block of ice slides freely [no air resistance, no friction] down a slippery slope
The block starts from rest at the top of the slope, where it has a vertical height of 4 m above the bottom of the slope and where it has a gravitational energy of 1000 J. The block's total energy a quarter of the way down the slope [at a height of 3 m] is A) 250 J. B) 500 J. C) 750 J. D) 1000 J. E) greater than 1000 J.