In all cases the wire shown carries a current I. For which situation is the magnitude of the magnetic field maximum at the point P?
4
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Suppose that we increase an N-atom Einstein solid’s value of q = U/? from q to q + 1. By what factor does the value of its multiplicity ? increase? (Choose whichever result is the closest, assuming that q >> 1 and N >> 1.)
A. q B. 3N C. q/3N D. 3N/q E. (q + 3N)/q F. (q +3N)/(qN)
In the Northern Hemisphere, cyclones rotate ________; whereas an anticyclone rotates ________
A) counterclockwise around a low pressure center; clockwise around a high pressure center B) clockwise around a low pressure center; counterclockwise around a high pressure center C) counterclockwise around a high pressure center; clockwise around a low pressure center
A steel beam (E 5 210 GPa) with I 5 119 3 106 mm4 and span length L 5 3.5 m is subjected to uniform load q 5 9.5 kN/m. The maxi-mum deflection of the beam is approximately:
(A) 10 mm
(B) 13 mm
(C) 17 mm
(D) 19 mm
The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
A. D. B. E. C. F. D. G. E. H.