you are holding two balloons of the same shape and size. one is filled with helium, and the other is filled with ordinary air. on which balloon is the buoyant force greater?

low freq = 100 mhz

low wavelength =101.7m

length = 3x10^8/freq

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.

real, smaller and upside-down.   so the answer should be b.

that would be because of both gravity and friction. so     c