A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball and stone pass each other?
A. 17 m
B. 21 m
C. 18 m
D. 27 m
E. 31 m
Answer: A
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Charge of uniform linear density (4.0 nC/m) is distributed along the entire x axis. Determine the magnitude of the electric field on the y axis at y = 2.5 m.
A. 36 N/C B. 29 N/C C. 43 N/C D. 50 N/C E. 58 N/C
An experiment similar to the Miller-Urey Experiment was more recently done by NASA using an icy mixture of water, methanol, ammonia and carbon monoxide. The mixture was exposed to ultraviolet radiation
The results of this experiment were that no amino acids or DNA were formed, but complex organic molecules were observed. The purpose of this experiment was to determine whether: A) DNA could form from amino acids. B) DNA could form from ultraviolet radiation. C) ultraviolet radiation could create amino acids. D) amino acids could form in the harsh vacuum of outer space. E) amino acids cold form from water, methanol, ammonia and carbon monoxide.
Magnetic Field of a Long Wire: Two long parallel wires placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current directly toward you, and the wire on your left carries current directly away from you. From your point of view, the magnetic field at a point exactly midway between the two wires
A. points upward. B. points downward. C. points toward you. D. points away from you. E. is zero.
What is the equivalent resistance between points a and b when R = 12 ??
A. 20 ? B. 16 ? C. 24 ? D. 28 ? E. 6.0 ?