If the velocity profile in a boundary layer was approximated by the linear distribution u = Ay + B , the boundary condition(s) that the profile would be required to satisfy is (are):
(A) (1) and (2)
(B) (1) and (3)
(C) (2) and (3)
(D) (1), (2), and (4)
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In science, words always
a. have the same meaning as common English words. b. mean very vague things, so scientists can hide their ignorance. c. have no reason for being; they must just be memorized. d. are used faddishly by scientists and the public. e. have specific meanings shared worldwide by all scientists.
Photon energies and wavelengths are _________related to each other.
Fill in the blank(s) with the appropriate word(s).
Potential of Point-Charges: Four charged particles (two having a charge +Q and two having a charge -Q) are arranged in the xy-plane, as shown in the figure. These particles are all equidistant from the origin. The electric potential (relative to infinity) at point P on the z-axis due to these particles, is
A. zero. B. positive. C. negative. D. impossible to determine based on the information given.
Of the earliest known planets, which exhibits retrograde motion?
A. Mars and Mercury B. only Mars C. Mercury, Venus, and Mars D. All of these choices are correct. E. None of these choices is correct.