An increase in temperature increases the reaction rate because

Temperature is considered to be one of the most important factors that are responsible for a chemical reaction to take place. This forms the major energy source that enhances the reaction rate. There is a direct relationship between the temperature and the reaction rate, as they are directly proportional to each other. An increase in temperature by about 10°C can result in double of the reaction rate at normal room temperature. By increasing the temperature, the molecules are forced to collide unevenly, with one another at greater energy, which eventually allows a reaction to take place.

Thus, increasing the temperature leads to an increase in the reaction rate.

nah.   i'm just sleepy.

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.