A string with a mass per length of 2.00 gm/m is stretched with a force of 150 N between two points that are 0.500 m apart. The fundamental frequency of the stretched string is in tune with the fundamental frequency of an organ pipe filled with air and open at both ends. The velocity of sound in air at 0
is 331 m/s. If the temperature of the air increases by 20
then what is the length of the organ pipe?
A. 70.5 cm
B. 62.6 cm
C. 59.3 cm
D. 53.8 cm
E. 50.2 cm
B. 62.6 cm
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Energy in Nuclear Reactions: Consider the nuclear reaction 
N + 
He ? 
O + 
H. The known atomic masses are
N: 14.003074 u
/>He: 4.002603 u
H: 1.007825 u
O: 16.999131 uWhat is the Q-value (or reaction energy) of this reaction? (1 u = 931.5 MeV/c2)
A. -1.191 MeV
B. -2.020 MeV
C. -6.725 MeV
D. -9.055 MeV
One way to increase the resolving power of a telescope is to
A. make its mirror smaller. B. make its mirror bigger. C. observe objects using longer wavelengths. D. replace its mirror with a lens of the same diameter.
Water must be pumped out of water-table wells but not out of ______________ wells
Fill in the blank(s) with correct word
A vertical cylinder, closed at the bottom end, contains 0.0100 mol of ideal gas. It is fitted at the top with a piston that can move freely
The mass of the piston is 14.0 kg and the initial height of the piston above the bottom of the cylinder is 25 cm. What is the temperature of the gas? (R = 8.31 J/mol ? K) A) 290 K B) 413 K C) 3620 K D) 405 K E) 500 K