Hydroelectric power produces electricity using falling water tidal movement pressurized steam geothermal heat

Hydroelectric power produces electricity using falling water.

Water of river is kept stored using dams. This water contains potential energy due to its height. This water is then allowed to fall through a height on a turbine. the water loses potential energy and transfers kinetic energy to turbines making them to spin. as the turbines spin, electricity is produced in generator.

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.

be subject to a force andchange its motion