At what time will a new moon set?
A) Noon.
B) It will not set at all.
C) Sunrise.
D) Midnight.
E) Sunset.
Ans: E) Sunset.
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The current through two identical light bulbs connected in series is 0.25 A. The voltage across both bulbs is 110 V. The resistance of a single light bulb is
A) 22 ohms. B) 44 ohms. C) 220 ohms. D) 440 ohms. E) none of the above
A 5.5 meter long Aluminum wire has resistance of 0.40 m?, ? = 2.82 × 10-8 ? ? m, ? = 4.29 × 10-3 C-1. Its conductivity is
A) 233. ? ? m. B) 3.55 × 107 ?-1 m-1. C) 2.5 × 103 ?-1 . D) 2.5 × 103 ? ? m. E) 2.33 × 107 ?-1 m-1.
A person who weighs 550 N empties her lungs as much as possible and is then completely immersed in water while suspended from a harness. Her apparent weight is now 21.2 N. What is her density?
A) 1050 kg/m3 B) 1040 kg/m3 C) 1030 kg/m3 D) 960 kg/m3 E) 56.1 kg/m3
A torque of 15.0 N•m is applied to a bolt. The bolt rotates through an angle of 360 degrees. The work done in turning the bolt is
A. 94.2 J. B. 91.3 J. C. 96.7 J. D. 89.9 J. E. 98.1 J.