If a sensor was placed in the flow of Problem 4, it would rotate about the z-axis at what angular velocity at (1, ?1)?
(A) 5 rad/s
(B) 4 rad/s
(C) 3 rad/s
(D) 2 rad/s
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The banking angle in a turn on the Olympic bobsled track is not constant, but increases upward from the horizontal. Coming around a turn, the bobsled team will intentionally "climb the wall," then go lower coming out of the turn
Why do they do this? A) to reduce the g-force on them B) to increase the g-force on them C) to prevent the bobsled from turning over D) to take the turn at a faster speed E) to give the team better control, because they are able to see ahead of the turn
The position of a mass that is oscillating on a spring is given by x = (12.3 cm) cos[(1.26s-1)t]. What is the velocity of the mass when t = 0.815 s?
A) - 13.3 cm/s B) 13.3 cm/s C) 8.02 cm/s D) - 8.02 cm/s E) 0 cm/s
Magnetic Poles: If you were to cut a small permanent bar magnet in half,
A. one piece would be a magnetic north pole and the other piece would be a south pole. B. neither piece would be magnetic. C. each piece would in itself be a smaller bar magnet with both north and south poles. D. None of these statements is true.
A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope. The count rate 24 minutes later is 1,000 counts per minute. The half-life of the radioisotope is 8 minutes
a. True b. False Indicate whether the statement is true or false