Power: If the power rating of a 400-? resistor is 0.80 W, what is the maximum current it can safely draw?
A. 45 mA
B. 18 mA
C. 4.4 mA
D. 2.0 mA
E. 320 mA
Answer: A
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Which of the following is true of a comet nucleus?
A) It is in its gaseous form when it is far from the Sun. B) It remains inactive while it is far from the Sun. C) It causes the tail of the comet to point toward the Sun. D) It is mainly composed of nonvolatile compounds.
Energy Levels: If light excites atomic hydrogen from its lowest energy level to the n = 12 level, what is the energy of the photons of this light?
A. 13.5 eV B. 32.2 eV C. 13.6 eV D. 0.0944 eV E. 1.13 eV
A uniform rod of length 4L, mass M, is suspended by two thin strings, lengths L and 2L as shown. What is the tension in the string at the left end of the rod?
Starting from rest, a dragster travels a straight 1/4 mi racetrack in 6.70 s with constant acceleration. What is its velocity when it crosses the finish line?
A) 296 mi/h B) 135 mi/h C) 188 mi/h D) 269 mi/h