Six trillion miles is equivalent in distance to one ______________
a. light-year
b. astronomical unit
c. parsec
d. billion meters
a
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A ball, of mass 100. g, is dropped from a height of 12. m. Its momentum when it strikes the ground is
A) 1.5 kg?m/s. B) 4.8 kg?m/s. C) 3.3 kg?m/s. D) 2.4 kg?m/s. E) 1.8 kg?m/s.
Rigel, a blue supergiant, is 17 times more massive than the Sun and, therefore, is likely ________ in age
Fill in the blank(s) with correct word
In a collision the total ____________ is the same before and after
Fill in the blank(s) with correct word
A 0.20-km wide river has a uniform flow speed of 3.0 m/s toward the east. A boat with a speed of 8.0 m/s relative to the water leaves the south bank and heads in such a way that it crosses to a point directly north of its departure point. How long does it take the boat to cross the river?
a. 29 s b. 23 s c. 25 s d. 27 s e. 17 s