Which colors has a wavelength shorter than the others?

blue, indigo and violet

Explanation: looking at the visible light spectrum, we have

R O Y G B I V

Where R = red , O = orange light, Y = yellow, G = green, B = blue, I = indigo and V = violet.

Towards the right of the spectrum is increasing frequency and energy which implies that red light has the least energy and frequency and violet has the highest energy and frequency.

Also along from left to right of spectrum is decreasing wavelength.

Hence red light has the highest lomgestvand violet has the shortest wavelength.

So we can conclude that the shades of blue that's blue, indigo and violet has the least wavelength.

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.

heats surface water up