RLC Circuits: A 120-V rms voltage is applied across a 6.0-?F capacitor and a series combination of a 100-? resistor. If the frequency of the power source is 60 Hz, what is the rms value of the current in the circuit?
A. 0.26 A
B. 0.36 A
C. 0.46 A
D. 0.56 A
E. 0.76 A
Answer: A
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At what two celestial locations do the celestial equator and ecliptic coincide?
a. winter solstice and summer solstice b. vernal equinox and autumnal equinox c. they coincide at all points because they are the same. d. north celestial pole and south celestial pole e. zenith and east point
Consider a two-slit interference experiment like the one shown in figure Q3.7b. The distance between adjacent bright spots in the interference pattern on the screen (A) increases, (B) decreases, or (C) remains the same if, The width of the slits increases
A. increases B. decreases C. remains the same
A water bug on the surface of a pond bobs up and down three times per second on ripples with wavelength 10.5 cm. A fish resting at the surface of the pond is 8.50 m from the water bug. How long does it take a ripple passing the water bug to reach the fish?
a. 27.0 s b. 243 s c. 81.0 s d. 0.893 s
Which of these did Count Rumford demonstrate?
a. That heat was only generated by fire, light, and sunshine. b. That caloric, or heat fluid, is a gas. c. That heat is a substance found in fire that is available only in limited amounts in every object. d. That heat can be generated in any amount wanted and was therefore not a material substance. e. That heat is a form of energy.