The magnetic field in a cyclotron is 0.50 T. What is the radius of the vacuum chamber for a maximum proton velocity of 
A. 0.11 m
B. 1.2 m
C. 0.21 m
D. 0.013 m
C. 0.21 m
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A boat, whose speed in still water is 1.75 m/s, must aim upstream at an angle of 26.3° (with respect to a line perpendicular to the shore) in order to travel directly across the stream. (a) Determine the speed of the current
(b) Determine the resultant speed of the boat with respect to the shore.
Rotational Dynamics: The rotating systems shown in the figure differ only in that the two identical movable masses are positioned a distance r from the axis of rotation (left), or a distance r/2 from the axis of rotation (right). If you release the hanging blocks simultaneously from rest, and call tL the time taken by the block on the left and tR the time taken by the block on the right to reach the bottom, respectively, then
A. tL > tR. B. tL = tR. C. tL < tR.
At the lowest point in a vertical dive (radius = 0.58 km), an airplane has a speed of 300 km/h which is not changing. Determine the magnitude of the acceleration of the pilot at this lowest point.
A. 26 m/s2 B. 21 m/s2 C. 16 m/s2 D. 12 m/s2 E. 8.8 m/s2
The change in constellations with the seasons are caused by ________.
A. the rotation of Earth B. the Sun's orbit around the center of the galaxy C. zodiacal shift D. the precession of Earth's axis E. the revolution of Earth