A CD has a diameter of 12.0 cm. If the CD starts from rest and has a constant angular acceleration of 0.600 
then the total acceleration of a point 3.00 cm from the center of the CD after 1.30 sec is
A. 0.0256 
B. 0.0306
C. 0.0415
D. 0.0472
E. 0.0502
A. 0.0256
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Three point charges are positioned as follows: 
is at (0.00 m, 0.00 m), 
is at (1.20 m, 0.00 m), and
is at (1.20 m, 1.60 m). If 
in what direction (ccw from the x axis) is the force on
?
a. 
b. 
c. 
d. 
e. 
The figure shows two point sources of light, A and B, that emit light waves in phase with each other. A is a distance of 3? from point P. B is distant 5? from P. (? is the wavelength.) The phase difference between the waves arriving at P from A and B is
?
?
A. 0 rad. B. ? rad. C. 2? rad. D. 3? rad. E. 4? rad.
As the air cools at night the relative humidity usually __________
Fill in the blank(s) with correct word
A beam of light that is parallel to the principal axis is incident on a concave mirror. What happens to the reflected beam of light?
A) It also is parallel to the principal axis. B) It is perpendicular to the principal axis. C) It passes through the center of curvature of the mirror. D) It passes through the focal point of the mirror. E) It passes between the focal point and the center of curvature of the mirror.