Q. A baseball is seen to pass upward by a window 15 m above the street with a vertical speed of 18 m/s. Assume the ball was thrown from the street. What was it's initial speed?
Q. Four conducting cylinders shown below are all made of the same material, although they differ in length and/or diameter. The cylinders are connected to four different batteries such that each circuit has the same current. Rank the voltage across each cylinder, from greatest to least.