Python While Loops:.
1. Given a variable s that is associated with non-empty string, write some statements that use a while loop to associate a variable vowel_count with the number of lower-case vowels ("a","e","i","o","u") in the string .
2. Assume the availability of a function is_prime. Assume a variable n has been associated with positive integer. Write the statements needed to find out how many prime numbers (starting with 2 and going in increasing order with successively higher primes [2,3,5,7,11,13,...]) can be added before exceeding n. Associate this number with the variable k.
3. Write some code that repeatedly reads a value from standard input into the variable response until at last a Y or y or N or n has been entered.

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

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.