Polaroid sunglasses reduce much glare by polarization axes that are
A) vertical.
B) horizontal.
C) at right angles to each other.
Answer: A
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The Moon's redness during a lunar eclipse is due to
A) light of lower frequencies reflected from the Moon. B) excess infrared radiation. C) an optical illusion. D) refracted light from Earth's sunrises and sunsets. E) none of the above
The velocity of an object as a function of time is given by v(t) = 2.00 m/s + (3.00 m/s) t - (1.0 m/s2 ) t2
Determine the instantaneous acceleration of the object at time t = 5.00 s. A) -8.00 m/s2 B) -7.00 m/s2 C) 2.00 m/s2 D) 0.00 m/s2 E) -2.00 m/s2
The capacitance per unit length of a very long coaxial cable, made of two concentric cylinders, is 50 pF/m
What is the radius of the outer cylinder if the radius of the inner one is 1.0 mm? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) A) 0.50 mm B) 4.0 mm C) 2.0 mm D) 3.0 mm E) 1.0 mm
Electric field is dimensionally equivalent to which of the following?
a. N/C2 c. N×m2/C2 b. N×m/C d. N/C