Pluto's bulk density is:
A) 3,400 kg/m3, comparable to our Moon's.
B) 2,100 kg/m3, similar to Callisto's mix of rock and ice.
C) 1,200 kg/m3, like Mimas, made of almost pure ice.
D) 700 kg/m3, like Saturn a mix of hydrogen and helium slush.
E) 400 kg/m3, like Comet Halley's nucleus, a ice ball with many gas pockets.
B
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Answer the following statement(s) true (T) or false (F)
1. Consider two q-vectors 
with possibly complex components. Their inner product 
is a real number.
2. The inner product of a vector with itself 
is a real number.
3. Consider two q-vectors 
with possibly complex components. Their inner product 
obeys the relation = 
4. Even though the observable Sy can only have the values 
, the expectation value 
can have any value between these two extremes.
Two spaceships traveling in opposite directions along parallel lines measure their own and the other spaceship's length while passing one another. The crew on spaceship A says that their ship is 1 000 m long and that ship B is 800 m long. The crew on ship B says that their ship is 1 000 m long and that ship A is 800 m long. At what speed does each crew say that the other ship is traveling
relative to their own ship? a. 0.36 c b. 0.60 c c. 0.64 c d. 0.80 c e. 1.25 c
A 1-gram sample of wood is taken from an ancient site. If the Carbon-14 activity of the sample is 30.5% that of present-day organic material, what is the age of the wood? (T1/2 for 14C is 5 730 years)
a. 3,980 years b. 6,800 years c. 5,200 years d. 9,820 years e. 10,920 years
A split highway has a number of lanes for traffic. For traffic going in one direction, the radius for the inside of the curve is half the radius for the outside. One car, car A, travels on the inside while another car of equal mass, car B, travels at equal speed on the outside of the curve. Which statement about resultant forces on the cars is correct?
A. The force on A is half the force on B. B. The force on B is half the force on A. C. The force on A is four times the force on B. D. The force on B is four times the force on A. E. There is no net resultant force on either as long as they stay on the road while turning.