30. according to chapter 13 in the course textbook, describe the time it would take for earth to orbit the collapsed sun if the sun collapsed into a black hole.

it would take the earth to orbit in 1 yr

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;