Four resistors having resistances of 20 ?, 40 ?, 60 ?, and 80 ? are connected in series across an ideal 50-V dc source
What is the current through each resistor?
A) 0.25 A B) 4.0 A C) 0.75 A D) 2.0 A E) 0.50 A
A
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Work: Two men, Joel and Jerry, push against a car that has stalled, trying unsuccessfully to get it moving. Jerry stops after 10 min, while Joel is able to push for 5.0 min longer. Compare the work they do on the car.
A. Joel does 75% more work than Jerry. B. Joel does 50% more work than Jerry. C. Jerry does 50% more work than Joel. D. Joel does 25% more work than Jerry. E. Neither of them does any work.
Imagine that you are on the Moon while your friend experiences a total solar eclipse on Earth. What do you see?
A) You also see a solar eclipse, except with the Sun completely covered by the Earth. B) You see a relatively small shadow on an otherwise full Earth. C) You see a full Earth, just as you would if there were no eclipse at this time. D) You cannot see the Earth because it is blocked by the Sun.
The number of states in the He+ ion corresponding to the principle quantum number n = 5 are
a. 18 b. 25 c. 50 d. 9 e. 11
The average kinetic energy per molecule in an ideal gas at 0 °C is zero
What will be an ideal response?