The total electric flux through a closed cylindrical (length = 1.2 m, diameter = 0.20 m) surface is equal to -5.0 N × m2/C. Determine the net charge within the cylinder
a. -62 pC
b. -53 pC
c. -44 pC
d. -71 pC
e. -16 pC
C
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Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A1 is 1 square inch, and the area A2 is 10 square inches. A force of 4 pounds is exerted downward on piston 1, as shown
 The pressure on A1 in psi is a. 0.25. b. 0.4. c. 4. d. 10. e. 40.Constant Angular Acceleration: An old 78 rpm record rotates through an angle of 320° as it slows down uniformly from 78.0 rpm to 22.8 rpm. What is the magnitude of the angular acceleration of the record?
A. 2.34 rad/s2 B. 5.46 rad/s2 C. 6.50 rad/s2 D. 8.35 rad/s2 E. 10.9 rad/s2
Why is the Moon's average surface temperature so much lower than Earth's?
A. The Moon has no atmosphere to help retain heat at its surface. B. The Moon's rotation rate is much slower than Earth's. C. The Moon is much smaller than Earth and cooled more quickly. D. The Moon reflects more of the Sun's energy than Earth. E. The Moon has no magnetic field to prevent infrared radiation from escaping.
Molecular Speeds: What is the average translational kinetic energy of an ideal gas at 819 K? The Boltzmann constant is 1.38 × 10-23 J/K.
A. 1.70 × 10-20 J B. 5.65 × 10-21 J C. 1.13 × 10-17 J D. 3.77 × 10-19 J