Physical science ! 1. what is botulism? a type of bacteria a type of low acid a disease that comes from ingesting c. bot toxins 2. what advantage does an electronic ph meter have over ph indicator paper? it has greater precision it can measure a larger range of ph values it can measure the ph of both acids and bases 3. how do food scientists use the ph scale? food scientists increase the ph of foods to prevent the growth and reproduction of bacteria while they are stored. food scientists decrease the ph of foods to prevent the growth and reproduction of bacteria while they are stored. food scientists can't change the ph of the food we eat, because it could make us sick.

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.

option number c is the right answer.