A vessel containing 10 kg of water is left out where it evaporates. If the temperature remains constant at 20°C, what is the change in entropy (in kcal/K)? (The latent heat of vaporization at 20°C is 585 cal/g.)
a. 30
b. 10
c. 20
d. 40
e. 290
c
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A submarine is located 1.000 km below the surface of the water. What is the absolute pressure of the seawater on the outside of the submarine? (density of seawater is 1,025 
A. 190.8 atm B. 193.5 atm C. 198.2 atm D. 100.1 atm E. 121.2 atm
Which of the following best distinguishes the Kuiper belt from the Oort cloud?
A) Both are made up of many comets, but Kuiper belt comets orbit within a donut-shaped region just beyond the orbit of Neptune, while Oort cloud comets orbit much farther from the Sun and can have orbits of all inclinations. B) The Kuiper belt is made up of rocky asteroids, while the Oort cloud is made up of icy comets. C) The Kuiper belt is located between the orbits of Mars and Jupiter, while the Oort cloud lies far beyond Neptune. D) The Kuiper belt consists of only of very large comets (similar in size to Pluto), while the Oort cloud consists only of very small comets.
What is a perm?
What will be an ideal response?
First Law of Thermodynamics: In an isochoric process, the internal (thermal) energy of a gas decreases by 50 J. How much work is done by the gas during this process?
A. 0 J B. 50 J C. -50 J D. 25 J E. -25 J