What is the energy contained in a 1.30 m3 volume near the Earth's surface due to radiant energy from the Sun

The energy contained is 5.856 x 10⁻⁶ J

Explanation:

Average energy density of electromagnetic radiation per unit volume is given by the equation;

²

where;

is permittivity of free space

is maximum electric field strength, this can be calculated from the intensity of sun reaching the Earth's surface.

The intensity of sun reaching the Earth is 1350 W/m²

Average energy density of electromagnetic radiation per unit volume;

The energy contained in a 1.30 m³ volume is given by;

E = (4.505 x 10⁻⁶)(1.3)

E = 5.856 x 10⁻⁶ J

Therefore, the energy contained is 5.856 x 10⁻⁶ J

pe = weightxheight = 2000x1000=2,000,000joules

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.