Which statement describes the use of control rods?
control rods are lowered into the reactor to slow down the reaction by absorbing neutrons.
control rods are lowered into the reactor to speed up the reaction by releasing neutrons.
control rods are raised out of the reactor to slow down the reaction by absorbing neutrons.
control rods are raised out of the reactor to speed up the reaction by releasing neutrons.

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0