A Teflon rod 6 inches in diameter and 2 feet long is at 230ºF. It is then exposed at one end to cool air so that that end is at 80ºF whereas the cylindrical surface cools to 150ºF. The other end remains at 230ºF. Determine the expected temperature distribution.
What will be an ideal response?
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If the top quark has a mass of 175 GeV/c2 , what is its mass in atomic mass units?
A. 175 u B. 188 u C. 163 u D. 58 u E. 19 u
The electric fields arriving at a point P from three coherent sources are described by E1 = E0 sin ?t, E2 = E0 sin (?t + ?/4) and E3 = E0 sin (?t + ?/2). Assume the resultant field is represented by Ep = ER sin (?t + ?). The amplitude of the resultant wave at P is
A. E0. B. 1.5E0. C. 1.7E0. D. 2.4E0. E. 2.9E0.
An up quark has charge +2/3, a down quark has charge -1/3, and a strange quark hascharge -1/3. The Sigma0 particle is formed by a combination of two down quarks and onestrange quark. What is its charge?
a) -1 b) +1/3 c) 1 d) 0 e) -1/3
Compared to our Sun, most stars in the halo are
A) old, red, and bright and have fewer heavy elements. B) old, red, and dim and have many more heavy elements. C) young, red, and dim and have fewer heavy elements. D) old, red, and dim and have fewer heavy elements. E) young, blue, and bright and have many more heavy elements.