Polarization: An ideal polarizer with its transmission axis rotated 30° to the vertical is placed in a beam of unpolarized light of intensity 10 W/m2. After passing through the polarizer, what is intensity of the beam?
A. 2.5 W/m2
B. 5.0 W/m2
C. 8.7 W/m2
D. 7.5 W/m2
E. 10 W/m2
Answer: B
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A 60.0 W light bulb radiates light uniformly in all different directions. What is the value of E at a distance of 0.400 m from the bulb?
A) 162 N/C B) 212 N/C C) 82.1 N/C D) 106 N/C E) 52.9 N/C
A simple pendulum, 2.0 m in length, is released with a push when the support string is at an angle of 25° from the vertical. If the initial speed of the suspended mass is 2.0 m/s when at the release point, what is its speed at the bottom of the swing? (g = 9.8 m/s2)
a. 2.3 m/s c. 2.8 m/s b. 2.6 m/s d. 0.5 m/s
Hereditary instructions for growth and development are carried in:
a. proteins b. carbohydrates c. DNA d. energy e. lipids
Addition by 1. Components: Vector 
has a magnitude of 6.0 m and points 30° north of east. Vector 
has a magnitude of 4.0 m and points 30° west of north. The resultant vector 
+ 
is given by
A. 9.8 m at an angle of 64° east of north. B. 9.8 m at an angle of 26° north of east. C. 7.2 m at an angle of 26° east of north. D. 3.3 m at an angle of 26° north of east. E. 3.3 m at an angle of 64° east of north.