A 0.500-H inductor is connected into a 110 V rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the inductor?
a. 0.189 A (rms)
b. 0.292 A (rms)
c. 0.584 A (rms)
d. 1.19 A (rms)
e. 0.093 A (rms)
c
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A circular space station (shaped like a big wheel) rotates 100 times in one hour. The apparent weight of an astronaut standing on the inside surface of the outer wall is equal to her weight on earth. How far from the axis of rotation is the inside surface of the station’s outer wall?
A. 322 m B. 102 m C. 56 m D. 1012 m
The point in Earth's orbit where Earth is farthest from the Sun is known as perihelion. precession. the winter solstice. aphelion. a and d.
a. aphelion.
b. perihelion.
c. precession.
d. the winter solstice
e. a and d
The important similarity that Newton noticed between a falling apple and the moon was that
A) the net force on both is away from Earth, i.e., outward from the center of Earth. B) both are good to eat. C) the velocities of both are toward Earth's center. D) both are moving. E) the accelerations of both are toward Earth's center.
You have exactly 4 resistors: one 3 ?, one 4 ?, one 5 ?, and one 6 ?. How can you combine these to make a 2 ? resistor? (The symbol ? stands for "ohm.")
A. Connect the 3 ? resistor in series with the 5 ? resistor B. Connect the 3 ? resistor in parallel with the 6 ? resistor C. Connect all four resistors in parallel with each other D. Connect the 3 ? resistor in parallel with the 4 ? resistor E. You can't make a 2 ? resistor from the choices listed