Which of these is/are not true of nuclear fission reactors?
a. Their intended output is heat.
b. They produce the majority of the electric energy used in the world.
c. There is a small chance one could explode like an atom bomb.
d. Some can produce or "breed" more nuclear fuel than they consume.
b, c
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What is the Sun mainly made of?
A) hydrogen and oxygen B) hydrogen and helium C) carbon and nitrogen D) oxygen and carbon E) nearly equal portions of all the elements
Whitney says that Gauss's law can be used to find the electric field of a sufficiently symmetrical distribution of charge as long as 
over the whole Gaussian surface. Algie says that the electric field must be a constant vector over the entire Gaussian surface. Which one, if either, is correct?
A.
B.
.C.
D.
holds only over a portion of the Gaussian surface.E.
anywhere on the surface.At what, if any, temperature are the numerical readings on the Fahrenheit and Celsius scales the same?
A) -30° B) -40° C) -50° D) -60° E) They can never read the same because they are based on different zeroes.
A slender uniform rod 100.00 cm long is used as a meter stick. Two parallel axes that are perpendicular to the rod are considered
The first axis passes through the 50-cm mark and the second axis passes through the 30-cm mark. What is the ratio of the moment of inertia through the second axis to the moment of inertia through the first axis? A) I2/I1 = 1.5 B) I2/I1 = 1.7 C) I2/I1 = 1.9 D) I2/I1 = 2.1 E) I2/I1 = 2.3