Suppose a highway curve is properly banked to eliminate friction for a speed of 45 mph. If your tires were bald and you wanted to avoid sliding on the road, you would have to drive
A) somewhat below 45 mph.
B) somewhat above 45 mph.
C) at exactly 45 mph.
Answer: C
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Unpolarized light of intensity I0 passes through two sheets of ideal polarizing material. If the transmitted intensity is 0.24 I0, what is the angle between the polarizer and the analyzer?
a. 61° b. 46° c. 61° d. 76° e. 0.81°
The geocentric model of the solar system is attributed to
a. Kepler. b. Brahe. c. Copernicus. d. Aristotle.
Which of the following objects is experiencing Earth's gravitational force?
A. a skydiver falling under the force of gravity B. an airplane taking-off C. a boat floating in water D. All of these choices are correct. E. Only an airplane taking-off and a skydiver falling under the force of gravity above.
0.0001895 can also be expressed as
A) 1.895 × 10-3. B) 1.895 × 10-4. C) 18.95 × 104. D) 1895 × 105. E) 189.5 × 107.