Max von Laue is known for his work with
A. double-slit interference.
B. single-slit diffraction.
C. x-ray crystallography.
D. holography.
E. magnetic resonance imaging.
C. x-ray crystallography.
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A mercury manometer measures a pressure of 200 mmHg. What is this pressure in atm?
A. 0.204 B. 0.263 C. 0.301 D. 0.325 E. 0.375
By operating a reversible heat engine with an ideal gas as the working substance in a Carnot cycle and measuring the ratio Qc /Qh, we can calculate
A. n, the number of moles of the ideal gas. B. the ratio Vc /Vh of the volumes of the ideal gas. C. the ratio Pc /Ph of the pressures of the ideal gas. D. the ratio PcVc /PhVh of the products of volumes and pressures of the ideal gas. E. the value of Avogadro's number.
When air is cooled below its dew point without condensation, it is said to be ______________
Fill in the blank(s) with correct word
Suppose that an atom has exactly two energy levels separated by an energy difference ?E. When such atoms are in contact with a reservoir at a temperature T1, the ratio of the number of atoms in the higher level to the number in the lower level is 
. If we increase the temperature to T2, the numerical value of this ratio
A. increases. B. decreases. C. remains the same.