An AC series circuit contains a resistor of 20 W, a capacitor of 0.75 mF, and an inductor of 80 mH. What frequency should be used to create a resonance condition in the circuit?
a. 650 Hz
c. 160 Hz
b. 530 Hz
d. 320 Hz
B
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Evaporation and precipitation are in balance over the
A) polar ice caps. B) continents. C) oceans. D) equator.
Suppose that you measure the parallax angle for a particular star to be 0.1 arcseconds. What is the distance to this star? (Hint: A star at a distance of 3.26 light-years has a parallax angle of 1.0 arcseconds.)
A) 0.1 light-years B) 0.326 light-years C) 10 light-years D) 32.6 light-years E) 3.26 light-years
What happens to two neutron stars that are orbiting so close together they emit gravitational waves?
A) The neutron stars will fly apart from one another. B) It has no effect. C) The neutron stars will spiral together and merge. D) The neutron stars will recombine and form a new, young star.
Several charges in the neighborhood of point P produce an electric potential of 6.0 kV (relative to zero at infinity) and an electric field of 36 N/C at point P. Determine the work required of an external agent to move a 3.0-?C charge along the x axis from infinity to point P without any net change in the kinetic energy of the particle
a. 21 mJ b. 18 mJ c. 24 mJ d. 27 mJ e. 12 mJ