The fastest we could accelerate a vehicle powered with an ion engine to is approximately
A) 1% of the speed of light
B) 0.001% of the speed of light
C) 0.1% of the speed of light
D) 10% of the speed of light
A
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You live at a latitude of 28° N. What is the angle between the northern horizon and the north celestial pole?
a. 62° b. 28° c. 40° d. 23.4° e. 5°
The amount of 
C in a bone is about one-fourth of what one would expect based on the relative abundance of 
C and 
C. Since the half-life of 
C is a bit less than 6000 y, the
bone’s age is closest to A. 36,000,000 y. B. 24,000 y. C. 12,000 y. D. 4000 y. E. 1500 y.
Which of the following is the main form of intermolecular attractions among water molecules?
A) hydrogen bonding B) induced dipole-induced dipole C) covalent bonding D) ion-dipole E) polar-induced polar
The moons of Mars are believed to be
a. composed primarily of iron and nickel. b. composed primarily of frozen gases of water and carbon dioxide. c. orbiting Mars in a direction opposite to the direction that Mars rotates. d. formed from material ejected from Olympus Mons and other large volcanoes on Mars. e. captured asteroids.