Gabriel used an iron nail to build an electromagnet (like the one seen below) that will pick up 4 paper clips. He has tried many changes to increase the strength of his electromagnet so that it will pick up 10 paper clips? For each of the following changes, predict and explain the most likely outcome for 2 points each:

Replacing the iron bolt with a plastic rod
Increasing the number of coils in the copper wire
Increasing the size of the battery

the answer is kevlar

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.

the rearrangement of particles in a physical change. hope this