What produces the lobes in double-lobed radio galaxies?
a. an accretion disk
b. a starburst event
c. black-hole jets
d. synchrotron radiation
e. high redshifts
c
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An object is thrown vertically upward such that it has a speed of 25 m/s when it reaches two thirds of its maximum height above the launch point. Determine this maximum height
a. 64 m b. 48 m c. 32 m d. 96 m e. 75 m
Solenoid: When you double the number of windings in an ideal solenoid while keeping all other parameters (radius, length and current) fixed, the magnetic field at the center of the solenoid will
A. double. B. triple. C. quadruple. D. be reduced by a factor of one-half. E. be reduced by a factor of one-fourth.
A simple pendulum consists of a mass M attached to a weightless string of length L. For this system, when undergoing small oscillations
A) the frequency is independent of the length L. B) the frequency is proportional to the amplitude. C) the frequency is independent of the mass M. D) the frequency is proportional to the period. E) the period is proportional to the amplitude.
When you stand at rest on a floor, the number of vertical forces acting on you is
A. Zero B. One C. Two D. Three E. Four