Each of the following elements is magnetic except
A. aluminum
B. cobalt
C. nickel
D. iron

A is the answer because it will not stick

aluminum

Explanation:

but some types of aluminum sticks

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.

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered