2.50 moles of a monatomic ideal gas expand adiabatically from an initial temperature of 300 K and an initial volume of 80.0 L to a final volume of 150 L. What is the final temperature of the gas?
A) 840 K
B) 563 K
C) 426 K
D) 287 K
E) 197 K
E
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What is the upper limit to the mass of a white dwarf?
A) There is no upper limit. B) There is an upper limit, but we do not yet know what it is. C) about 2.8 solar masses D) about 1.4 solar masses E) about 1 solar mass
An astronaut traveling with a speed v = 0.90 c holds a meterstick in his hand. If he measures its length, he will obtain a value of
a. 1.0 m b. 2.3 m c. 0.19 m d. 0.43 m e. 0.81 m
Work Done by a Gas: A gas expands from an initial volume of 0.040 m3 and an initial pressure of 210 kPa to a final volume of 0.065 m3 while its temperature is kept constant. How much work is done by the gas? (R = 8.31 J/mol ? K)
A. 3.7 kJ B. 4.1 kJ C. 5.3 kJ D. 5.6 kJ E. 7.9 kJ
In ultrasound the _____________ of the sound is much greater than in normal sound
a. frequency b. period c. wavelength d. amplitude e. speed