a bullet of mass mb is fired horizontally with speed vi at a wooden block of mass mw resting on a frictionless table. the bullet hits the block and becomes completely embedded within it. after the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed vf

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.

it would be c. predictability

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.