A rock falls off a cliff and hits the ground after three seconds. The rock's velocity is 29. 4 m/s when it hits the ground. What is its acceleration of the rock in the downward direction? 0. 31 ms2 3 ms2 9. 8 ms2 88. 2 ms2.

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

The radius of an atom is closest in size to a