How many neutrons are in a 
nucleus?
A. 79
B. 179
C. 118
D. Some other number (specify)
C. 118
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A typical "shooting star" during a meteor shower is caused by a ________ entering Earth's atmosphere.
A) boulder-size particle from an asteroid B) boulder-size particle from a comet C) pebble-size particle from an asteroid D) pebble-size particle from a comet E) microscopic particle of interstellar dust
A small glass bead has been charged to 8.0 nC. What is the magnitude of the electric field 2.0 cm from the center of the bead? (k = 1/4??0 = 8.99 × 109 N • m2/C2)
A) 1.8 × 105 N/C B) 3.6 × 103 N/C C) 1.4 × 10-3 N/C D) 3.6 × 10-6 N/C
The charge on the square plates of a parallel-plate capacitor is Q
The potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. The amount of charge on the plates is now equal to A) 4Q. B) 2Q. C) Q. D) Q/2. E) Q/4.
Suppose an object is placed 6.0 cm in front of a lens that has a focal length of 4.0 cm. Where is the image located? What are the magnification and the character of the image?