The ideal mechanical advantage of a pulley system is equal to the? a. distance the load has to move b. length of the rope c. number of rope segments supporting the load d. weight of the object being lifted

Number of rope segments supporting the load.

Explanation:

In general the mechanical advantage of any simple machine is defined as the ratio of output force to the input force. It is also defined as the ratio of input arm distance to the output arm distance.

But in case of pulley, the ideal mechanical advantage is equal to the number of rope segments supporting the load. Hence, the correct option is (c).

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.

i think it would be 5