___________ clusters are compact, round, and red, containing mostly old stars
Fill in the blank(s) with correct word
Globular
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Consider two copper wires. One has twice the cross-sectional area of the other. How do the resistances of these two wires compare?
A) Both wires have the same resistance. B) The thicker wire has half the resistance of the shorter wire. C) The thicker wire has twice the resistance of the shorter wire. D) none of the given answers
Relative to an initial height, an object raised twice as high has a gravitational potential energy
A) half as much B) twice as much. C) four times as much. D) need more information
How much heat energy is needed to change 10 kg of water at 50°C to steam at 120°C?
A) 4.2 × 105 J B) 2.3 × 107 J C) 4.2 × 106 J D) 3.6 × 106 J E) 2.5 × 107 J
A long thin uniform rod of length 1.50 m is to be suspended from a frictionless pivot located at some point along the rod so that its pendulum motion takes 3.00 s. How far from the center of the rod should the pivot be located?
A) 7.98 cm B) 7.52 cm C) 8.73 cm D) 8.40 cm E) 23.4 cm