Desalination is needed in order to obtain potable water from
a glaciers
b aquifers
c lakes
d oceans

What are the north and south poles of a solenoid change with?

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.

Two positive charges are equal. which has more electric potential energy?