A monatomic ideal gas at
undergoes an isobaric process from A to B followed by an isochoric process from B to C. What is the total work done in these two processes? (A = 2atm, 1L; B = 2atm, 2L; C = 1atm, 2L)
A. 202 J
B. 231 J
C. 187 J
D. 195 J
A. 202 J
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A measuring stick on a rapidly rotating disk will not appear to shrink if it is oriented along the
A) circumference. B) radius. C) either of these D) neither of these
A skydiver of 75-kg mass has a terminal velocity of 60 m/s. At what speed is the resistive force on the skydiver half that when at terminal speed?
a. 15 m/s b. 49 m/s c. 30 m/s d. 42 m/s e. 36 m/s
The near point of a farsighted person is 65 cm. What power contact lens must he use to correct this problem and be able to read a book at a normal near point of 25 cm?
A) -4.2 diopters B) +4.2 diopters C) -2.4 diopters D) -2.5 diopters E) +2.5 diopters
A +20-nC point charge is placed on the x axis at x = 2.0 m, and a -25-nC point charge is placed on the y axis at y = -3.0 m. What is the direction of the electric field at the origin?
a. 209° b. 61° c. 29° d. 241° e. 151°