A CD has a diameter of 12.0 cm and is rotating at an angular velocity of 10.0 rad/sec. If the CD has a constant angular deceleration of -0.5 
then the angular velocity of the CD after 3.0 sec is
A. 5.7 rad/s.
B. 6.2 rad/s.
C. 7.9 rad/s.
D. 8.5 rad/s.
E. 9.8 rad/s.
D. 8.5 rad/s.
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__________is a unit of distance equal to the distance light travels in 1 year
A) The astronomical year B) The light-year C) A light parsec D) A light meter
A beam of light of two different wavelengths enters a pane of glass 3.00 mm thick at an angle of incidence of 56°. The indices of refraction for the two different colors are 1.514 and 1.528
Because of dispersion, the colored beams, although parallel, are separated by a small distance. How far apart are they? A) 0.057 mm B) 0.0083 mm C) 0.025 mm D) 0.014 mm E) 0.0062 mm
A shot-putter moves his arm and the 6.00-kg shot through a distance of 1.25 m, giving the shot a velocity of 8.20 m/s from rest. Find the average force exerted on the shot during this time
a. 323 N b. 161 N c. 118 N d. 12.7 N e. 252 N
The figure shows a cross section of three parallel wires each carrying a current of 20 A. The currents in wires A and B are out of the paper, while that in wire C is into the paper. If the distance R = 5.0 mm, what is the magnitude of the force on a 2.0-m length of wire A?
a.
23 mN
b.
64 mN
c.
32 mN
d.
46 mN
e.
55 mN