The pH of a solution decreases by 2.0. How does the hydronium ion concentration of the solution change? increases to 2 times the original concentration increases to 100 times the original concentration decreases to one one hundredth. of the original concentration decreases to one half. of the original concentration

Distinguish between a transverse wave and a longitudinal wave.

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?