Video 2 (Chapter 19): If you have a short focal length converging lens what can be said about the power of the lens?
A. The power is large and positive
B. The power is small and positive
C. The power is small and negative
D. The power is large and negative.
Ans: A. The power is large and positive
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A rock attached to a string swings in a vertical circle. Which free-body diagram could correctly describe the force(s) on the rock when it is at the highest point, where 
is the normal force, 
is weight, and
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B.
C.
D.
E.
In its simplest form, the theory of Terrestrial protoplanet growth supposes that:
A) all the planetesimals in each orbital zone had about the same gravitational pull. B) all the planetesimals in each orbital zone had about the same chemical composition. C) all the planets formed in rotating disks of gas and dust around young stars. D) all the planets of our Solar System formed as the Sun condensed from the interstellar medium.
If the net force acting on an object is in the positive x-direction, the object moves only in the positive x-direction
1.True 2.False
What is the outside temperature if 4000 kcal of heat is lost through a 4.0 m2 pane of 0.30 cm thick glass (k = 2.0 × 10-4 kcal/s?m?°C) in one hour from a house kept at 20°C?
A) 0°C B) 4°C C) 16°C D) 18°C E) 24°C