In the diagram, each resistor is 3 ohms and the battery is 9 volts. What is the current through the middle resistor?
A. 3 A to the right
B. 3 A to the left
C. 9 A to the right
D. 9 A to the left
E. 1 A to the left
B. 3 A to the left
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The orbits of population I stars I. are confined to disk of the galaxy. II. are very elliptical. III. are nearly circular. IV. are randomly inclined to the disk of the galaxy
a. I b. IV c. I & IV d. II & IV e. I & III
The Doppler effect in the spectra of quasars show very high _______________
Fill in the blank(s) with correct word
Which of the following is not produced by plate tectonics?
a. mid-ocean rifts b. rift valleys c. the ring of fire d. the Appalachian Mountains e. Earth's magnetic field
Potential Energy: A 7.0-?C point charge and a 9.0-?C point charge are initially extremely far apart. How much work does it take to bring the 7.0-?C point charge to the point x = 3.0 mm, y = 0.0 mm, and the 9.0-?C point charge to the point x = -3.0 mm, y = 0.0 mm? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 95 J B. 190 J C. 63 J D. 16 J