Which of the following is not a good conservation law?
c. trangeness is not conserved in weak interactions.
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In an LCR series circuit with XL > XC, the phase angle between the current and voltage phasors is 30°. If the AC frequency doubles, what is the magnitude of the resulting phase angle?
a. 30° b. less than 30° c. more than 30° d. Additional information is needed to reach a determination.
A certain amount of ideal monatomic gas is maintained at constant volume as it is cooled from 455K to 405 K. This feat is accomplished by removing 400 J of heat from the gas. How much work is done by the gas during this process?
The ideal gas constant is R = 8.314 J/mol ? K. A) 0.00 J B) 200 J C) 400 J D) -400 J E) -200 J
A wooden block contains some nails so that its average density is exactly equal to that of water. If it is placed in a tank of water and released from rest when it is completely submerged, it will
A) rise to the surface. B) sink to the bottom. C) remain where it is released.
If the dust around a protostar radiates most strongly at 30 microns or 30,000 nm, what is the approximate temperature of that dust? Hint: T in K = 3,000,000/wavelength in nm or use Wien's Law
a. 100,000 K b. 10,000 K c. 1000 K d. 100 K e. 10 K