The color to which human eyes are most sensitive is
A) red.
B) yellow-green.
C) blue.
D) all the same
Answer: B
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Given the equation 
, which answer or answers provide(s) the best description of a possible physical situation?
A. A 20.00-N tension pulls a 2.00-kg mass. The 2.00-kg mass pulls another 2.00-kg mass. B. A 20.00-N force pushes a 2.00-kg mass. The 2.00-kg mass pushes another 2.00-kg mass. C. A 2.00-kg mass on a flat surface is acted on by gravity while another 2.00-kg mass sits on top of it. D. All of the situations above are possible. E. Only (a) and (b) above are possible.
Graphical Analysis: The motions of a car and a truck along a straight road are represented by the velocity-time graphs in the figure. The two vehicles are initially alongside each other at time t = 0. 
At time T, what is true of the distances traveled by the vehicles since time t = 0?
A. They will have traveled the same distance. B. The truck will not have moved. C. The car will have travelled further than the truck. D. The truck will have travelled further than the car.
Which of the following is most like the rotation of stars in the disk of the Milky Way?
A) a DVD in a player B) the planets in our solar system C) cars moving at a constant speed on a circular race track D) the hands of an analog clock E) the tire of a car moving
Exclusion Principle: Write out the electron configuration for the ground state of the phosphorus atom, which has 15 electrons.
Fill in the blank(s) with the appropriate word(s).