At Point A, the beginning of the observations, the substance exists in a solid state. 1. The material in this phase has Fixed
volume and
Fixed
shape
2.
With each passing minute,
Heat
is added to the substance.
3.
This causes the substance to
more rapidly which we detect by a
collide
Temperature rise in the substance.
4
Melt
At Point B, the temperature of the substance is
°C. The solid begins to
or in a
state
5. At Point C, the substance is completely
liquid
Fixed
volume and
no definite shar
.
6. Material in this phase has
7. The energy put into the substance between 5 and 9 minutes was used to convert the substance from a
Solid
to a
This heat energy is called the latent heat of fusion
of the substance.
8. Between 9 and 13 minutes, the added energy increases the
liquid

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