A 6.0-?F air capacitor is connected across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5)
How much additional charge flows from the battery, which remained connected during the process? A)
1.2 mC
B)
1.5 mC
C)
1.7 mC
D)
2.1 mC
E)
2.5 mC
D
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An aluminum bar of diameter d 5 52 mm is twisted by torques T1 at the ends. The allowable shear stress is 65 MPa. The maximum permis-sible torque T1 is approximately:
(A) 1450 N?m
(B) 1675 N?m
(C) 1710 N?m
(D) 1800 N?m
What do the structures of Stonehenge, the Templo Mayor, and the Sun Dagger all have in common?
A) They were all places used for religious sacrifice. B) They were all built on the orders of ancient Mediterranean kings. C) They all can be used as lunar calendars. D) They were all used by ancient peoples for astronomical observations. E) all of the above
Amy, Brad, and Cate are walking (or running) along a straight line as shown below
A device that measures absolute air pressure is called a
a. manometer b. barometer c. thermometer d. tire gauge e. none of the above