Asphere of radius r = 5cm carries a uniform volume charge density rho = 400 nc/m^3. q. what is the total charge q of the sphere?

The total charge Q of the sphere is .

Explanation:

Given that,

Radius = 5 cm

Charge density

We need to calculate the total charge Q of the sphere

Using formula of charge

Where, = charge density

V = volume

Put the value into the formula

Put the value into the formula

Hence, The total charge Q of the sphere is .

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.