A series RLC circuit has a resistance of 500
and inductance of 20.0 mH, and a capacitance of 2.00 
F The power source provides a voltage of v = (170 sin(377t))V. What is the impedance of this circuit?
A. 0.402 k
B. 1.33 k
C. 1.25 k
D. 1.41 k
E. 2.15 k
D. 1.41 k
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That the radio lobes radiate synchrotron radiation indicates that
a. high speed electrons are spiraling through a magnetic field. b. the source of the radio jets must be a black hole. c. the source of the radio energy is rotating rapidly. d. the central galaxy must be a giant elliptical galaxy. e. the central galaxy must rotate about two nearly perpendicular axes.
A 50 cm long organ pipe is filled with air and is open at both ends. The velocity of sound in air at 0
is 331 m/s. What is the wavelength of the second mode?
A. 50 cm B. 75 cm C. 90 cm D. 40 cm E. 63 cm
A system of blocks and a frictionless pulley is shown in the figure. Block A has a mass of 2.0 kg and is on a rough horizontal surface for which ?s = 0.40 between the surface and block A
The rope pulls horizontally on block A. Block C has a mass of 1.0 kg. An external force P = 23.0 N, applied vertically to block A, maintains the system at rest as shown in the figure. What is the friction force on block A? A) 6.3 N B) 6.9 N C) 7.5 N D) 5.7 N E) 5.1 N
A person has a mass of 45 kg. How much does she weigh on the Moon, where g = 1.62 m/s 2
A) 45 N B) 73 N C) 7.4 N D 220 N E) 440 N