H+ ions increase in concentration at lower pH values. What is the concentration of H+ ions at a pH = 2?
Calculate how many more H+ ions there are in a solution
mol/L
at a pH = 2 than in a solution at a pH = 6. Find the
What is the concentration of H+ ions at a pH = 6?
concentration of Htions at a pH = 2 and at a pH = 6 in
Table B. Then divide the concentration of H+ ions at a
mol/L
pH = 2 by the of H+ ions at a pH = 6. Record your answer How many more H+ ions are there in a solution at a
in Table C.
pH = 2 than in a solution at a pH = 6?

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.

Choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. a 1.0 kg block is placed on top of a 2.0 kg block. a horizontal rope pulls the 2.0 kg block across a frictionless floor with a force of 21.0 n. the coefficient between the two blocks is 0.75. does the 1.0 kg block on top slide?