Telescopes operating at this wavelength must be cooled to observe faint astronomical objects
A) radio
B) extreme infrared
C) visible
D) X-ray
E) gamma-ray
B
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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. -1.191 MeV
C. 1.279 × 10-3 MeV
D. -1.279 × 10-3 MeV
Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature (in kelvins) do their readings measure the same temperature?
A. 218.15 B. 233.15 C. 273.15 D. 40.15 E. 0
A Carnot engine is operated as a heat pump to heat a room in the winter. The heat pump delivers heat to the room at the rate of 34 kJ per second and maintains the room at a temperature of 293 K when the outside temperature is 229 K
The power requirement for the heat pump under these operating conditions is closest to A) 7500 W. B) 6000 W. C) 17,000 W. D) 13,000 W. E) 9600 W.
When an oscillator is driven in resonance,
a. there are no standing waves. b. any driving frequency may be used. c. all natural frequencies are present. d. there is maximum energy transfer.