An alpha particle (a helium nucleus) is lying at rest, att =0 an electric field given by e = 31+ 2) + 5k (n/c) applied on the particle for 5s then the electric field vanished; later on magnetic field given by b = (t + 5) + (3t+ -t) (mt) applied on the particle for 50 s. att - 8 s (take two when the magnetic field applied) find (a) the particle's speed, (b) the radius of the circle for the alpha particle trajectory, and (c) the period of the motion?

increases it

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.

v=ir = 3x15 =45 v