Arandom star has a surface temperature of 7300 k and a radius 100 times that of the sun. calculate the luminosity of the star compared to the sun. estimate what it’s apparent magnitude would be if it was only ∼ 1 pc away like the nearest stars. compare this to other night sky objects.

The plum pudding model of the atom state that ?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

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