A5000 ω resistor, an uncharged 300.0 μf capacitor are connected to an unknown battery. a) what is the time constant of this circuit? b) how long will it take for the capacitor to be 75% charged?

i think it would be 80 km/h because 30 + 50 = 80 (sorry if this not the right answer i'm trying my best)

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

if you answer my question i will answer yours

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.