Series/Parallel Circuits: If V = 20 V and the battery is ideal, what is the current through R3 in the figure?
A. 0.050 A
B. 0.20 A
C. 1.0 A
D. 4.0 A
Answer: B
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A 35.0 kg child swings on a rope with a length of 6.50 m that is hanging from a tree. At the bottom of the swing the child is moving at a speed of 4.20 m/s. What is the tension in the rope?
A. 95.0 N B. 438 N C. 343 N D. 366 N
A battery charges a parallel-plate capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on the plates remains constant
) What happens to the potential difference between the plates as they are being separated? A) It decreases. B) It increases. C) It remains constant. D) There is no way to tell from the information given.
We have direct experimental evidence (from large particle accelerators) for the physical conditions in the universe back to about ________ after the Big Bang
A) 3 minutes B) 10-10 seconds C) 1 million years D) 380,000 years E) 300 years
A gamma ray has an energy of 1 MeV. (a) What is the frequency associated with this photon? (b) What is the wavelength associated with this photon?
What will be an ideal response?