A scientist conducts an experiment to see if acids affect the health of a particular type of plant. Three sets of plants were treated with acidic solutions of a pH of 2, pH of 4, and a pH of 6, while the control set was treated with a solution of neutral pH 7. Results of the experiment: Plants treated with a pH (2) - 10 of 10 plants are dead Plants treated with a pH (4) - 5 of 10 plants are dead Plants treated with a ph (6) - 2 of 10 plants are dead Plants treated with a ph (7) - 0 of 10 plants are dead Which is the best conclusion for this experiment? A. Low acidity is harmful to this type of plant. B. High acidity is harmful to this type of plant. C. It's not clear D. Acid has no effect on the health of this type of plant.

mistakes are ok

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.