At what rate is thermal energy generated in the 30-? resistor?
A. 20 W
B. 27 W
C. 60 W
D. 13 W
E. 30 W
Answer: D
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The position of a mass that is oscillating on a spring is given by x = (18.3 cm) cos[(2.35s-1)t]. What is the frequency of this motion?
A) 0.426 Hz B) 1.34 Hz C) 2.67 Hz D) 0.128 Hz E) 0.374 Hz
You do not see your image when you look at a flat rough aluminum surface because of __________
Fill in the blank(s) with correct word
Refer to the figure above. Suppose that an electron makes a transition from n = 3 to n = 2 and emits a photon of frequency 4 × 1014 Hz. Then an electron that makes a transition from n = 3 to n = 1 may emit a photon with a frequency of
1) 1 × 1014 Hz, 2) 3 × 1014 Hz, 3) 4 × 1014 Hz, 4) 9 × 1014 Hz, which is consistent with emission of the most energetic photon from a transition from n = 3 to 5) n = 1. 6) n = 2. 7) either, as both transitions are equivalent.
The planets all orbit in the same direction around the sun.
Indicate whether the statement is true or false.