One mole of an ideal gas freely expands from 1.00 liter to 2.00 liters. The change in entropy in the expansion is
A. 5.80 J/K
B. 8.50 J/K
C. 16.3 J/K
D. 18.7 J/K
A. 5.80 J/K
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A 3.0-kg block is dragged over a rough horizontal surface by a constant force of 16 N acting at an angle of 37° above the horizontal as shown. The speed of the block increases from 4.0 m/s to 6.0 m/s in a displacement of 5.0 m. What work was done by the friction force during this displacement?
a.
?34 J
b.
?64 J
c.
?30 J
d.
?94 J
e.
+64 J
Which of these Galilean satellites is most geologically active?
a. Io b. Europa c. Callisto d. Ganymede
You are designing a generator with a maximum emf 8.0 V. If the generator coil has 200 turns and a cross-sectional area of 0.030 m2, what would be the frequency of the generator in a magnetic field of 0.030 T?
A) 7.1 Hz B) 7.5 Hz C) 8.0 Hz D) 22 Hz E) 44 Hz
In a reference frame floating in space, which do you think follows the straighter path?
A. The earth B. The moon C. The center of mass of the earth/moon system