A car traveling at constant speed has a net work of zero done on it.
Answer the following statement(s) true (T) or false (F)
Ans: True
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The phase of matter in the Sun is
A) gas. B) plasma. C) liquid. D) solid. E) a mixture of all of the above
Isolated bells ring clearly, while bells crammed in a box have a muffled ring. This is analogous to light emitted by
A) a laser. B) a fluorescent lamp. C) an incandescent lamp. D) a phosphorescent source. E) none of the above
Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.You drop the box. As it falls to its original level, its kinetic energy is
a. 0 b. 4 J. c. 100 J. d. none of the above.
In the vicinity of what frequency does an object with a temperature of 1000 K radiate the largest amount of power?
(c = 3.00 × 108 m/s, Wien displacement law constant equals 2.90 × 10-3 m ? K, ? = 5.670 × 10-8 W/m2 ? K4) A) 8.0 × 1014 Hz B) 6.7 × 1014 Hz C) 2.3 × 1014 Hz D) 1.0 × 1014 Hz E) 4.1 × 1014 Hz