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ฟิสิกส์โอลิมปิก วิทยาศาสตร์โอลิมปิก ข้อสอบแข่งขัน ข้อสอบชิงทุน => GRE - Physics => Topic started by: conantee on January 08, 2010, 01:50:43 AM



Title: GR8677.088
Post by: conantee on January 08, 2010, 01:50:43 AM
88. Consider a system of N noninteracting particles confined in a volume V at a temperature such that the particles obey classical Boltzmann statistics. If the temperature is lowered to the point at which quantum effects become important, the pressure of the gas may differ depending on whether the particles are fermions or bosons. Let P_F be the pressure exerted by the particles if they are fermions, P_B be the pressure if they are bosons, and P_C be the pressure the particles would exert if quantum effects are ignored. Which of the following is true?
(A) P_F = P_B = P_C
(B) P_F > P_C > P_B
(C) P_F > P_B > P_C
(D) P_F < P_B < P_C
(E) P_F < P_C < P_B