From a height of 11 meters above the ground, a rock is thrown vertically upwards with an initial velocity of 20 meters per second. After a few seconds and at what speed does this rock reach the ground?

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

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

The two required components for a generator are