Selina drops a golf ball down a deep well. the ball falls with only the force of gravity acting on it. without any air resistance, as the golf ball falls into the well, its acceleration is:

a. constant
b. increasing
c. decreasing
d. changing

Its acceleration is constant

Explanation:

Objects such as the golf ball fall towards the center of the earth due to the force of gravity. The acceleration due to the force of gravity causes objects to fall freely towards the earth's center.Air resistance is one of the forces that reduce the motion of a freely falling object. However, when the air resistance is negligible the object falling to the group will have a constant acceleration due to gravitational acceleration.Thus, the acceleration of freely falling objects without any air resistance is equal to the acceleration due to gravitational pull which is a constant.

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.