A parallel-plate capacitor is disconnected from a battery, and the plates are pulled a small distance farther apart. Does Q increase, decrease, or stay the same?
1.increase
2.decrease
3.remains the same
3
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Harlow Shapley made the first accurate determination of the position of the center of the galaxy by studying ____
a. globular clusters b. open clusters c. emission nebulae d. spiral tracers e. stellar associations
A positive ion has more
A) electrons than neutrons. B) electrons than protons. C) protons than electrons. D) protons than neutrons. E) neutrons than protons.
The total electromagnetic power emitted by the Sun is 3.8 ×1026 W. What is the radiation pressure near the orbit of Mercury, which has an orbital radius of 5.8 × 1010 m?
A) 3 × 10-5 N/m2 B) 3 × 10-7 N/m2 C) 3 × 10-8 N/m2 D) 3 × 10-4 N/m2 E) 3 × 10-6 N/m2
An educated scientific guess is a
A) hypothesis. B) theory. C) either of these D) neither of these