A ball is kicked from the origin with an initial speed of 10 = 25.0 /, at an angle with the horizontal. At the same time, a second ball is thrown vertically upward from the ground at
point P, at = 40.0 m with an initial speed of v20 = 15.0 m/s as shown in the figure below.
Assume that both balls are shot at time t = 0
a) If the two balls are to hit each other, what must θ be? [4 points]
b) At what time the two balls will hit each other?

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

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

Which describes increasing the efficiency of energy resource