Which of the following is a method of heat transport that involves the movement of warm molecules of gas or liquid from one region to another?
a. Convection
b. Conduction
c. Radiation
Answer: a. Convection
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During a basketball game, a player shoots a ball from half-court. When the ball reaches a height of 4.5 m above the floor, it is moving at 5.0m/s. If the ball was released from 2.5 m above the floor, what was the angle above the horizontal of the ball’s initial velocity?
a. 
b. 
c. 
d. 
e. 
f. 
When light is either reflected or refracted, the quantity that does not change in either process is its
A. direction of travel. B. dispersion. C. frequency. D. speed. E. wavelength.
Which best expresses the value for the coefficient of volume expansion, ?, for given material as a function of its corresponding coefficient of linear expansion, ??
a. ? = ?3 b. ? = 3? c. ? = ?2 d. ? = 2?
In a certain region, the electric potential due to a charge distribution is given by the equation V(x,y) = 2xy - x2 - y, where x and y are measured in meters and V is in volts
At which point is the electric field equal to zero? A) x = 0.5 m, y = 0.5 m B) x = 0 m, y = 0 m C) x = 1 m, y = 0.5 m D) x = 1 m, y = 1 m E) x = 0.5 m, y = 1 m