A series circuit consists of a 100-? resistor, a 10.0-?F capacitor, and a 0.350-H inductor. The circuit is connected to a 120-V rms, 60-Hz power supply. What is the rms current in the circuit?
A) 0.42 A
B) 0.52 A
C) 0.62 A
D) 0.72 A
D
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The foot pedal on hydraulic brake system exerts a force of 45 lbs on a piston with a diameter of 1.00 cm. The brake fluid in the brake system exerts the pressure from the foot pedal on a brake pad piston with a diameter of 2.50 cm. The force on the brake pad is
A. 133 lbs. B. 150 lbs. C. 281 lbs. D. 350 lbs. E. 402 lbs.
A parcel of warmed air rises due to
A) random molecular motion. B) radiation. C) buoyancy. D) increased energy of its molecules.
How are wavelength, frequency, and energy related for photons of light?
A) Longer wavelength means higher frequency and lower energy. B) Longer wavelength means lower frequency and lower energy. C) Longer wavelength means lower frequency and higher energy. D) Longer wavelength means higher frequency and higher energy. E) There is no simple relationship because different photons travel at different speeds.
Physicists are currently working to achieve a unification of
A) all of the fundamental forces. B) apples and oranges. C) electricity and magnetism. D) matter and radiation. E) Newtonian and quantum physics.