What type of particle accelerator has two large D-shaped electrodes with a small gap between them, through which an alternating potential difference accelerates the particles in a constant magnetic field?
A) linear accelerator B) synchrotron
C) cyclotron D) None of the above
C
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If we could watch spiral arms from a telescope situated above the Milky Way over 500 million years, what would we see happen?
A) Stars will move through the spiral arms, bunching up closer as they pass through. Young hot stars will form and die within the arms before having a chance to move out. B) The spiral arms will seem to "wind up," wrapping more and more tightly around the center of the Galaxy. C) The spiral arms will quickly dissipate and fade away, because they are a temporary phenomenon that should only last for a million years or so. D) The spiral arms will eventually unwind, as centripetal forces send the stars flying outward into intergalactic space.
The field just outside the surface of a long conducting cylinder which has a 2.0-cm radius points radially outward and has a magnitude of 200 N/C. What is the charge density on the surface of the cylinder?
A. 2.7 nC/m2 B. 1.8 nC/m2 C. 3.5 nC/m2 D. 4.4 nC/m2 E. 0.90 nC/m2
How many forces act on an upwardly tossed coin when it gets to the top of its path?
A) one; the force due to gravity B) two; gravity and the force in the coin itself C) three; gravity, the coin's internal force, and a turnaround force D) none of the above
Because of the ______________ zones formed by S and P waves as they travel through Earth, the outer core is thought to be a viscous liquid
Fill in the blank(s) with correct word