Calculate the energy (in kW?h) given off if five kg of plutonium-239 undergoes complete fission. The energy released per fission is 200 MeV. (1 MeV = 1.6 × 10^?13 J)
a. 1.1E+11 kW?h
b. 6.4E+12 kW?h
c. 1.6E+16 kW?h
d. 1.1E+8 kW?h
e. 5.4E+9 kW?h
d
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Components: Vector 
is along the +x-axis and vector 
is along the +y-axis. Which one of the following statements is correct with respect to these vectors?
A. The x component of vector 
is equal to the x component of vector 
.
B. The y component of vector 
is equal to the y component of vector 
.
C. The x component of vector 
is equal to the y component of vector 
.
D. The y component of vector 
is equal to the x component of vector 
.
Which of the following seems to be a region of self-sustaining star formation?
A) The Orion complex B) The asteroid belt C) The Kuiper Belt D) The Solar System
A child grips tightly the outer edge of a playground merry-go-round as other kids push on it to give it a dizzying rotational velocity. When the other kids let go, the horizontal component of the net force on the child points most nearly
A. Inward toward the center of the merry-go-round. B. Outward away from the center of the merry-go-round. C. In the direction of rotation. D. Nowhere: the net force’s horizontal component is zero. E. In some other direction (specify).
A farmer is applying compressed nitrogen to a field from a tank originally at 800 kPa. The temperature of the nitrogen as it leaves the tank is approximately:
(A) ?140°C (B) ?120°C (C) ?100°C (D) ?80°C