Plane polarized light of intensity 
is passed through a polarizer oriented at 45 
to the original plane of polarization. What is the intensity transmitted?
A. 0.70 
B. 0.50
C. 0.35 
D. 0.25 
E. 0.00
B. 0.50
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The radius of the Sun is 6.95 × 108 m. It radiates heat at the rate of 5.42 × 1026 W. Assuming that it is a perfect emitter, what is the temperature of the surface of the Sun? The Stefan-Boltzmann constant is 5.67 × 10-8 W/(m2?K4)
A) 6.30 × 103 K B) 8.25 × 103 K C) 8.87 × 103 K D) 3.93 × 107 K E) 5.78 × 107 K
A ball is thrown with an initial speed of 60 m/s at an angle of 30° above the horizontal. What is the ball's horizontal displacement at the end of 4 seconds? Use g = 10 m/s2
A) 240 m B) 60 m C) 120 m D) 210 m E) 140 m
A projectile is thrown horizontally at 11.5 m/s. The projectile hits the ground 0.570 s later. What is the angle of impact the projectile makes with the horizontal ground?
a. –29.1° b. –25.9° c. 119° d. –89.7° e. –64.1°
Why do the predicted consequences of the special theory of relativity seem so strange to most of us?
A) because they are obvious only at speeds that we never experience in our daily lives B) because they are self-contradictory, making it impossible to make any sense of them C) because they contradict the well-tested ideas of Newton's laws of motion D) because they affect only subatomic particles and not big things like people