Carnot Engine: An ideal Carnot engine operates between a high temperature reservoir at 492 K and a river with water at 290 K. If it absorbs 4000 J of heat each cycle, how much work per cycle does it perform?
A. 1642 J
B. 2358 J
C. 1483 J
D. 2517 J
Answer: A
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The Balmer series of spectral lines corresponds to transitions ending in a state of quantum number n= ________.
Fill in the blank(s) with the appropriate word(s).
A. Bulb A glows but bulb B goes out. B. Bulb B glows but bulb A goes out. C. Both bulbs continue to glow. D. Both bulbs go out. E. One needs more information to answer.
A website's search feature not only searches the website for the term, but also elsewhere on the web.
Answer the following statement true (T) or false (F)
Polarization: The following items are positioned in sequence: A source of a beam of natural light of intensity I0, three ideal polarizers A, B, and C; and an observer. Polarizer axis angles are measured clockwise from the vertical, as viewed by the observer. The axis angle of polarizer A is set at 0° (vertical), and the axis angle of polarizer C is set at 50°. Polarizer B is set so that the beam intensity at the observer is a maximum. What is the axis angle settings of polarizer B?
A. 0° B. 25° C. 50° D. 75° E. 100°