Force on a Moving Charge: A proton has an initial velocity to the south but is observed to curve upward as the result of a magnetic field. This magnetic field must have a component
A. to the west.
B. to the east.
C. upward.
D. downward.
E. to the north.
Answer: B
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A. 155.9 mmHg. B. 142.3 mmHg. C. 126.3 mmHg. D. 102.4 mmHg. E. 198.3 mmHg.
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Of the frequencies listed below, to which one is the human ear most sensitive?
a. 33 Hz c. 3300 Hz b. 330 Hz d. 33,000 Hz
In which case will the woman see a just a spectrum that is almost entirely black except for few bright emission lines?
A) 1 B) 2 C) 3 D) 4