Consider a system consisting of two Einstein solids P and Q in thermal contact. Assume that we know the number of atoms in each solid and ?. What do we know about the system if we also know the total energy in each of the two objects?
A. Its macrostate
B. Its microstate
C. Its macropartition
D. Its microstate and macropartition
E. Its macrostate and macropartition
F. Its macrostate and microstate
T. Its macrostate, microstate, and macropartition
E. Its macrostate and macropartition
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The density of an object is defined as
A. the volume occupied by each unit of mass. B. the amount of mass for each unit of volume. C. the weight of each unit of volume. D. the amount of the substance that has unit volume and unit mass. E. the amount of the substance that contains as many particles as 12 grams of the carbon-12 isotope.
What evidence do astronomers have that the Universe is expanding?
A. There is a measurable redshift in the spectral lines of distant galaxies. B. Galaxies disappear when they pass the cosmic horizon. C. The disks of galaxies are getting smaller over time. D. Nearby clusters of galaxies are smaller than more distant ones. E. Distant galaxies are dispersing, pulled apart by the expansion of space.
Express (2.2 × 106)-1/2 in scientific notation
A) 6.7 × 10-4 B) 1.5 × 103 C) 1.5 × 10-5 D) 1.5 × 104
A pressure of 10.0 mm Hg is measured using a constant-volume gas thermometer at a temperature of 50.0°C. What is the pressure (in mm Hg) at the zero-point temperature?
a. 31.8 b. 11.8 c. 8.45 d. 54.6 e. 68.3