While you are standing next to a fire, your body begins to heat up. this is heat transfer by?

conduction

convection

aeration

radiation

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; how far out of place which the object finished relative to the starting location;