A brick is resting on a rough incline as shown in the figure. The friction force acting on the brick, along the incline, is
A) zero.
B) equal to the weight of the brick.
C) greater than the weight of the brick.
D) less than the weight of the brick.
Answer: D
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A conducting sphere of radius 20 cm is charged to a potential of 
volts. What is the charge on its surface?
A. 22 
C
B. 4.4 C
C. 4.7 mC
D. 9.0 nC
E. 16 mC
If you had limited funds to build a large telescope, which type would you choose, a refractor or a reflector? Why?
What will be an ideal response?
If you exert a force F on an object, the force which the object exerts on you will
A) depend on whether or not the object is moving. B) depend on whether or not you are moving. C) depend on your mass. D) depend on the object's mass. E) always be -F.
An EM wave with a wavelength of 500 nm will be visible
Indicate whether the statement is true or false