The period P of oscillation of a pendulum (the time interval needed to complete one full oscillation) can be expressed in terms of the mass m of the plumb bob, the length l of the string, and the acceleration due to gravity, g, as P = kmb1cgd, where
k, b, c, and d are dimensionless constants. What must be the values of b, c, and d?
b = 0, c = 1/2, d = -1/2
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A series of 3 uncharged concentric shells surround a small central charge q. The charge distributed on the outside of the third shell is
A. ?3q. B. ?(ln 3)q. C. +q. D. +(ln 3)q. E. +3q.
The intricate patterns visible in an X-ray image of the Sun generally show ________
A) structure within sunspots B) a bubbling pattern on the photosphere C) helioseismological fluctuations D) extremely hot plasma flowing along magnetic field lines
As the angle of incidence is decreased for a ray incident on a reflecting surface, the angle between the incident and reflected rays ultimately approaches what value?
a. 90° c. 45° b. 180° d. zero
A light ray reflects from a surface. If the angle of incidence is 
what is the angle that the reflected ray makes with the surface?
A. 
B. 
C. 
D. 
E. 