Water at the surface of a small pond in toronto is at the freezing point as the sun sets on a winter day. in one hour, the water loses 5,738,000 j of thermal energy to its surroundings. how much water in the pond turns to ice in that hour?

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.

the answer is a. at the equator