The acceleration of gravity on Earth is approximately 10 m/s2 (more precisely, 9.8 m/s2). If you drop a rock from a tall building, about how fast will it be falling after 3 seconds?
A) 30 m/s
B) 10 m/s
C) 30 m/s2
D) 10 m/s2
E) 20 m/s
A) 30 m/s
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A resistor and a capacitor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across the resistor is
A) greater than the battery's terminal voltage. B) equal to the battery's terminal voltage. C) less than the battery's terminal voltage, but greater than zero. D) zero.
A little known fact is that both Robinson Crusoe and Friday wore eyeglasses. As it so happens, Robinson Crusoe was farsighted while Friday was nearsighted
Whose eyeglasses did they use whenever they wanted to start a fire by focusing the sun's rays? A) Robinson Crusoe's B) Friday's C) Both would work equally well. D) Both actually worked, but Friday's was a little bit better. E) Neither's worked, but fortunately they were in possession of matches.
Which type of weather is characterized by spiral storms with winds of up to 300 km/hour?
A) hurricanes B) tornadoes C) tropical depressions D) tropical storms
What is the angular resolution of the eye at a wavelength of 500 nm for a pupil diameter of 2.8 mm?
A. 
B. 
C. 
D. 
E. 