A 150. W lamp is placed into a 120. V AC outlet
(a) What are the peak and rms currents?
(b) What is the resistance of the lamp?
(a) 1.77 A; 1.25 A
(b) 96.0 ?
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Consider an AC series circuit containing a coil, capacitor, and resistor. Doubling the frequency will change the inductive reactance by what factor?
a. 1.0 c. 1/2 b. 1.41 d. 2.0
In a fusion bomb, what initiates, or triggers, the fusion reaction?
A) a sudden release of neutrons B) a laser beam C) conventional chemical explosive, designed to implode instead of explode D) nuclear magnetic resonance E) a fission explosion
A heat pump has a coefficient of performance that is 60% of the Carnot heat pump coefficient of performance. The heat pump is used to heat a home to 24.0°C during the winter with the low temperature reservoir at the outdoor temperature
At which outdoor temperature would it be more efficient to add the energy directly to the interior of the home than use it to run the heat pump? A) -25.2°C B) -154°C C) -40.0°C D) -83.4°C E) -4.00°C
Talk about vertigo! You've been dropped at the edge of a cliff, looking down for what seems to be miles! There's only one way to go from here: up! But it's going to be quite a climb, requiring all of the mountaineering skills you've ever heard of
The atmosphere here is very thin even at the mean surface level of this place; at altitude you'll never get a lungful. No matter, though; you could not breathe this atmosphere anyway, since it contains no oxygen; it's mostly carbon dioxide. You climb and climb; this mountain must be three times the height of Everest, and much broader at its base! There are clouds around you, and you can find water ice as well. When you try to melt it, however, it does not turn to liquid (it vaporizes to gas). Oh well, just keep climbing. But what will you do when you get to the top?