You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. When you increase the plate separation, what happens to the value of C?

1.It increases.
2.It decreases.
3.It stays the same.


2

Physics & Space Science

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Satellites in low-Earth orbits are more likely to crash to Earth when the sunspot cycle is near solar maximum because

A) it is too dangerous to send the Space Shuttle to service satellites during solar maximum. B) Earth's upper atmosphere tends to expand during solar maximum, exerting drag on satellites in low orbits. C) of increased magnetic interference. D) they are more likely to have their electronics "fried" by a solar flare during solar maximum.

Physics & Space Science

Answer the following statement(s) true (T) or false (F)

1. When you go over the crest of a hill in a roller coaster, a force appears to lift you up out of your seat. This is a fictitious force 2. If your car is hit from behind, you are suddenly pressed back into the seat. The normal force that the seat exerts on you is a fictitious force. 3. You are pressed downward toward the floor as an elevator begins to move upward. The force pressing you down is a fictitious force.

Physics & Space Science

A charged particle (mass = m, charge = q > 0) moves in a region of space where the magnetic field has a constant magnitude of B and a downward direction. What is the magnetic force on the particle at an instant when it is moving horizontally toward the north with speed v?

a. qvB toward the east b. Zero c. qvB toward the west d. qvB upward e. qvB toward the south

Physics & Space Science

A. The divergence is positive. B. The divergence is negative. C. The divergence is zero.

Physics & Space Science