Two people are on a ride where the inside cars rotate at constant angular velocity three times the constant angular velocity of the outer cars. If the two cars are in line at t = 0, and moving at 3? and ? respectively, at what time will they next pass each other?
A.
B.
.C.
.D.
.E.
.Answer: C
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An incompressible fluid flows steadily through a pipe that has a change in diameter. The fluid speed at a location where the pipe diameter is 8.0 cm is 1.28 m/s. What is the fluid speed at a location where the diameter has narrowed to 4
0 cm? A) 0.32 m/s B) 0.64 m/s C) 1.28 m/s D) 2.56 m/s E) 5.12 m/s
A Hertzsprung-Russell diagram shows stars on a plot of
A) luminosity vs. distance. B) magnitude vs. apparent brightness. C) apparent brightness vs. temperature. D) luminosity vs. temperature.
Elliptical galaxies
A) tend to be smaller than the other types of galaxies. B) have little in the way of dust and gas. C) are thought to be former starburst galaxies. D) All of the above
In nickel-silver copper alloys, the major alloy elements are nickel and _________.
Fill in the blank(s) with the appropriate word(s).