Question 10 A ball is thrown up in the air and allowed to drop back down to hit the ground. What happens to the ball's potential energy as it moves
upwards in the air?

A ball is thrown up in the air and allowed to drop back down to hit the ground. What happens to the ball's potential energy as it moves

upwards in the air?

Explanation:

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.