The metric prefix that means one thousand is
a. milli-
b. centi-
c. one-
d. kilo-
e. mega-
D
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You are standing at the North Pole. Which way is Polaris, the North star?
A) The answer depends on what time of day (or night) it is. B) The answer depends on whether it's winter or summer. C) directly overhead D) 30 degrees up, due West E) on the northern horizon
What do we mean by the main-sequence turnoff point of a star cluster, and what does it tell us?
A) It is the spectral type of the hottest main sequence star in a star cluster, and it tells us the cluster's age. B) It is the point in a star cluster beyond which main sequence stars are not found, and it tells us the cluster's distance. C) It is the luminosity class of the largest star in a star cluster, and it tells us the cluster's age. D) It is the mass of the most massive star in the star cluster, and it tells us the cluster's size.
The gain in speed each second for a freely-falling object is about
A) 0 m/s. B) 5 m/s. C) 10 m/s. D) 20 m/s. E) depends on the initial speed.
The angle that a swinging simple pendulum makes with the vertical obeys the equation ?(t) = (0.150 rad) cos[(2.85 rad/s)t + 1.66]. (a) What is the length of the pendulum?
A) 0.15 m B) 0.83 m C) 1.21 m D) 2.02 m E) It cannot be determined from the information given. (b) What is the mass of the swinging bob at the end of the pendulum? A) 2.85 kg B) 1.66 kg C) 0.454 kg D) 0.150 kg E) It cannot be determined from the information given.