In order to control a nuclear reactor, control rods can be pulled out of or pushed into the reactor core by remote control. These rods control the reactor by
a. slowing down the fast neutrons so the neutrons can be absorbed by 238U.
b. speeding up slow neutrons so the neutrons can be absorbed by 238U.
c. slowing down fast neutrons so they cannot initiate further fusion reactions in 235U.
d. speeding up fast neutrons so they cannot initiate further fusion reactions in 235U.
e. capturing thermal neutrons so they cannot initiate further fission reactions in 235U.
e
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A very large sheet of a conductor carries a uniform charge density of 4.00 pC/mm2 on its surfaces. What is the electric field strength 3.00 mm outside the surface of the conductor? (?0 = 8.85 × 10-12 C2/N ? m2)
A) 4.52 × 105 N/C B) 2.26 × 105 N/C C) 9.04 × 105 N/C D) 0.452 N/C E) 0.226 N/C
The graphs below represent current and voltage phasors at one instant of time. The solid arrows represent the voltage phasors, ?Vmax, and the dashed arrows represent the current phasors, Imax. Which graph shows the correct relationship between current and voltage phasors for a capacitor in an RC circuit?
a.
b.
c.
Distinguish between laminar and turbulent flow of fluids
What will be an ideal response?
You could use two parallel wires to move objects 1 and 2 apart if each wire is embedded in its own object and if 
A. one wire carries a current and the other wire has zero current. B. the currents in the wires are in the same direction. C. the currents in the wires are in opposite directions.