An FM radio station broadcasts at 98.6 MHz. What is the wavelength of the radiowaves?
A. 60.8 m
B. 6.08 m
C. 3.04 m
D. 0.314 m
E. 0.33 cm
Answer: C
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RLC Circuits: The figure shows a series ac circuit. The inductor has a reactance of 50 ? and an inductance of 220 mH. An 80-? resistor and a capacitor whose reactance is 160 ? are also in the circuit, and the rms current in the circuit is 2.2 A. What is the voltage amplitude across the capacitor?
A. 390 V B. 330 V C. 270 V D. 220 V E. 190 V
A protostar develops a bipolar flow of gas when it is still surrounded by an equatorial disk of ________
Fill in the blank(s) with correct word
Imagine for a moment that despite all the evidence, Earth actually is not rotating and orbiting the Sun. Which of these hypothetical observations (none of them are real) would be inconsistent with our Sun-centered view of the solar system?
A) We find that we are unable to measure any parallax for a distant galaxy. B) We discover an Earth-sized planet orbiting the Sun beyond the orbit of Pluto. C) We discover that the universe is actually contracting, not expanding. D) We discover a small planet beyond Saturn that rises in the west and sets in the east each day.
A very large sheet of a conductor carries a uniform charge density of 4.00 pC/mm2 on its surfaces. What is the electric field strength 3.00 mm outside the surface of the conductor? (?0 = 8.85 × 10-12 C2/N ? m2)
A) 4.52 × 105 N/C B) 2.26 × 105 N/C C) 9.04 × 105 N/C D) 0.226 N/C E) 0.452 N/C