Occasionally an asteroid will break into fragments due to a collision. these fragments, which often contain ice, can leave the asteroid belt and make their way to earth. upon entering earth's atmosphere, the fragment would be heated to a high temperature by frictional forces. what would happen to any ice contained within the fragment? what type of phase change would this be? is this type of change considered a chemical change or a physical change?

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

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

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?