An object is placed 10 cm to the left of a converging spherical lens. The lens has a focal length of f = 5 cm. Where is the image formed?
a. 3.3 cm to the left of the lens
b. 3.3 cm to the right of the lens
c. 10 cm to the left of the lens
d. 10 cm to the right of the lens
d
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Pressure in a Liquid: An air bubble underwater has the same pressure as that of the surrounding water. As the air bubble rises toward the surface (and its temperature remains constant), the volume of the air bubble
A. increases. B. decreases. C. remains constant. D. increases or decreases, depending on the rate it rises.
Liquid crystals have the useful property that
A. they are very strong in one direction but very weak in another. B. their transparency can be changed by applying an electric field. C. they can behave like liquid semiconductors and make computers more flexible. D. they can change from a liquid state to a solid state instantly.
A constant force is acting on an object. Which of these graphs best represents the velocity of the object?
A. 
B. 
C. 
Phil leans over the edge of a cliff and throws a rock upward at 5 m/s. Neglecting air resistance, two seconds later the rock's speed is
A) zero. B) 5 m/s. C) 10 m/s. D) 15 m/s. E) none of the above