An AC series circuit contains a resistor of 30.0 ?, a capacitor of 1.22 ?F and an inductor of 154 mH. What frequency should be used to create a resonance condition in the circuit?
a. 3.49E+2 Hz
b. 8.48E+2 Hz
c. 9.21E+2 Hz
d. 3.67E+2 Hz
e. 7.35E+2 Hz
d
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It is possible to detect Doppler shifts due to light on each side of a rapidly spinning star. Suppose it is seen that a nearby star, relatively stationary to us, is blueshifted in light on one side of the star and redshifted in the light from the other side. Suppose a star of radius 2.5 x 108 km has a rotational period of 72 h. Light shifted from 525 nm on the side of the star moving toward us will be shifted to what wavelength?
A. 536 nm B. 504 nm C. 530 nm D. 520 nm E. 546 nm F. 514 nm
The laws of physics demand that a neutron star has a maximum mass of ____ solar mass(es)
a. 1 b. 1.4 c. 3 d. 8 e. 20
When a beam of nuclear radiation of initial intensity I0 passes through a thickness x of material, the intensity of the beam exiting the material is I =
a. I0e??x. b. I0e?x. c. I0(e??x ? 1). d. I0(e?x ? 1). e. I0(1 ? e??x).
Which of the following is a longitudinal wave?
A. A wave on string under tension B. A light wave C. A sound wave in a gas D. All of these choices are correct E. None of these choices are correct