Two capacitors with CA greater than CB are connected in parallel with a battery. Which of the following is true?
a. There is more potential difference across CA.
b. There is more potential difference across CB.
c. There is the same charge stored on each capacitor.
d. There is the same potential difference across both capacitors.
d
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The sun has a radius of
km and a rotational period of 25.38 days. What is the difference is there in the peak of the observed spectrum between light received from the approaching side of the Sun and from the receding side of the sun? Observations from the middle of the sun place the spectral peak at 480 nm.
A. 13 nm B. 6.4 nm C. 1.6 nm D. 3.2 nm
The equation that solves a problem is 
. The problem is:
A. How far above its initial position does a rock travel in 2.0 s when thrown up from a point 40 m above the ground? B. How far below its initial position does a rock travel in 2.0 s when thrown up from a point 40 m above the ground? C. What is the position relative to the ground of a rock thrown up at 3.0 m/s from a roof 20 m above the ground 2.0 s after it is released? D. What is the change in position relative to the ground of a rock thrown up at 3.0 m/s from a roof 20 m above the ground 2.0 s after it is released? E. What is the position relative to the ground of a rock thrown up at 3.0 m/s from a roof 20 m above the ground if its maximum height is 33.6 m?
Approximately what percentage of mass-energy of infalling matter can be converted to thermal energy when the matter is falling into a supermassive black hole?
A) about the same as that converted by hydrogen fusion B) much less than that converted by hydrogen fusion C) much more that converted by hydrogen fusion
Thermal efficiency (non-Carnot) is
A) Q/T. B) Q/m. C) 1 – Qcold/Qhot. D) Q - W. E) 1 - Tcold/Thot.