A cyclotron with a magnetic field of 1.2 T is used to accelerate protons. How long does it take for the protons to make one complete trip around the cyclotron at a radius of 25 cm?
A. 11 ns
B. 28 ns
C. 32 ns
D. 48 ns
E. 55 ns
E. 55 ns
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A nylon bar (E 5 2.1 GPa) with diameter 12 mm, length 4.5 m, and weight 5.6 N hangs vertically under its own weight. The elongation of the bar at its free end is approximately:
(A) 0.05 mm
(B) 0.07 mm
(C) 0.11 mm
(D) 0.17 mm
Why is January a cold month in the northern United States?
A) Earth is near its farthest point from the sun. B) There's more snow in January. C) The northern hemisphere is farther from the sun than the southern hemisphere. D) The northern hemisphere is tilted away from the sun.
Is it possible for the decay product of radioactive decay to be radioactive? Explain
What will be an ideal response?
Constant Acceleration Kinematics: A baseball is hit with a bat and, as a result, its direction is completely reversed and its speed is doubled. If the actual contact with the bat lasts 0.45 s, what is the ratio of the magnitude of the average acceleration of the ball to its original speed?
A. 6.7 s-1 B. 4.4 s-1 C. 2.2 s-1 D. 0.15 s-1