Apocket watch contains a long, spiral piece of metal which is coiled tightly as the watch is wound. what form of potential energy is involved in winding a pocket watch?

Elastic Energy

Explanation:

If we tightly coiled the watch metal wire, then it stores the Elastic Potential energy. The metal spiral wire is in the form of spring and when we compress it stores Elastic potential Energy because work is done to distort the shape of spring.

The metal wire has some spring constant which opposes the applied force while coiling it and thus wire also applies a minimal reaction force in the response of action force.                                          

answer: decibel

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.