A gas expends to three times its original volume, and in the process no energy is transferred to the gas. What happens to the internal energy of this gas?
a. It increases
b. It decreases.
c. It remains constant.
d. Impossible to know without more information
b
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An 8.00 kg object has a moment of inertia of 1.50 kg 
If a torque of 2.00 N•m is applied to the object, the angular acceleration is
A. 0.750 
B. 1.00
C. 1.33
D. 2.01
E. 2.67
Even though K- and M-type stars are suitable for life, why might they not have many habitable planets around them?
A) because their habitable zones are very wide B) because their habitable zones are very narrow C) because their lifetimes are too short D) because they contain too few heavy elements to form planets
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 40.0-kg child sits on the other end
The beam balances when a fulcrum is placed below the beam a distance 1.10 m from the 30.0-kg child. How long is the beam? A) 2.12 m B) 1.98 m C) 1.93 m D) 2.07 m E) 2.20 m
Astronomers measure distances across the sky as _____
A) angles expressed in units of degrees and subdivisions of degrees B) volume expressed in units of gallons and pints C) energy expressed in units of calories and joules D) length expressed in units of miles and yards