What is one disadvantage of a series circuit?
a. the bulbs in a series circuit will give off more heat then the same bulbs in a parallel circuit.
b. if one bulb burns out, then none of the others will light up.
c. it is difficult to tell which path an electric charge is following in a series circuit
d. only one bulb can be connected in a series circuit.

If one bulb goes out then all the others won't light up because electricity will be cut off. It's a disadvantage because in a parallel circuit if one bulb burns out all the others will still be on because they won't be affected. I hope I've helped you ☺

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

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.