A charge, +Q, is placed inside a balloon and the balloon is inflated. As the radius of the balloon r increases the number of field lines going through the surface of the balloon:
a. increases proportional to r2.
c. stays the same.
b. increases proportional to r.
d. decreases as 1/r.
C
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Capacitors in Combination: A 9.00-µF and a 12.0-µF capacitor are connected together, and this combination is connected across a 25.0-V potential difference. How much electric energy is stored in the combination if they are connected (a) in parallel or (b) in series?
What will be an ideal response?
You have a covered pot on a stove and you turn the heat on. If you assume that the pot and lid combination leaks, what can be said about the pressure, the volume and the amount of air within the pot on the stove after the heat is turned on compared to before the heat is turned on? Ignore changes in the size of the pot associated with the thermal expansion of the pot itself
1.After the heat is turned on, the pressure within the pot is greater than it was before, the volume is the same, and the amount of air is less. 2.After the heat is turned on, the pressure within the pot is less than it was before, the volume is the same, and the amount of air is the same. 3.After the heat is turned on, the pressure within the pot is the same, the volume is the same, and the amount of air is less. 4.After the heat is turned on, the pressure within the pot is the same, the volume of air is less, and the amount of air is less.
We know that Earth has water. However, according to our theory of solar system formation, the inner solar system was too hot for hydrogen compounds like water to condense. What do we conclude?
A) Water arrived on Earth at a time when it rained throughout the inner solar system. B) Earth's water likely was brought here by asteroids or comets that formed beyond the frost line. C) Our theory of solar system formation will need modification because it is unable to account for the existence of water on Earth. D) Earth's water probably originated through chemical reactions among the rock and metal of Earth's interior.
When atmospheric pressure increases, what happens to the absolute pressure at the bottom of a pool?
A) It does not change. B) It increases by a lesser amount. C) It increases by the same amount. D) It increases by a greater amount. E) It depends on the depth of the pool.