Three essential components of a nuclear reactor are: a fissionable fuel , control rods, and
A) a "scrubber" to prevent radioactive isotopes from getting into the environment.
B) lead to stop the neutrons.
C) tritium to speed up the neutrons.
D) a coolant to transfer the heat from the reactor to the turbine.
E) a radioactive substance to keep the reaction going.
D
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The ability of a steel to be hardened to a specific depth is the _________.
Fill in the blank(s) with the appropriate word(s).
If it takes 50 J of energy to move 10 C of charge from point A to point B, what is the magnitude of the potential difference between points A and B?
A) 500 V B) 5.0 V C) 50 V D) 0.50 V
A rectangular loop (area = 0.15 m2) turns in a uniform magnetic field with B = 0.20 T. At an instant when the angle between the magnetic field and the normal to the plane of the loop is (p/2) rad and increasing at the rate of 0.60 rad/s, what is the magnitude of the emf induced in the loop?
a. 24 mV b. zero c. 18 mV d. 20 mV e. 6.0 mV
The process of crystallization enriches a magma in
A) silica. B) minerals that have low melting points. C) silica and other minerals that have low melting points. D) all of the above.