If a 0.20 pF capacitor has a voltage of 40 mV, how many more electrons are on the negative plate than on the positive plate?
a. 
b. 
c. 
d. 
e. none, the electrons are in equal numbers on the plates
c.
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A mercury-in-glass thermometer reads an outside temperature of 20ºC. If the sky and surroundings of the thermometer have an average surface temperature of 5ºC, estimate the net radiation per unit area from or to the thermometer.
What will be an ideal response?
A galaxy with randomly oriented elongated star orbits and little gas and dust would be a(n) _______________ galaxy
Fill in the blank(s) with correct word
The number of different kinds of leptons, including antiparticles as different, is
A) 4. B) 6. C) 8. D) 2. E) 12.
Which is greater, the gravitational attraction between a newborn baby and the Earth, or the gravitational attraction between the Earth and all the planets of the solar system?
A) the attraction between the baby and Earth B) the attraction between the planets and Earth C) They are roughly equal. D) The baby's and the planets gravitational attractions are inversely proportional to each other.