12. What is the speed of a wave with a wavelength of 10 meters and a frequency of 100 Hz?

The speed of the wave is 1000 m/s.

Explanation:

Speed of a wave will always be equal to the product of wavelength and frequency of the wave.

Since, here the wavelength is given as 10 m and frequency is given as 100 Hz, the multiplication of these two terms will specify the speed of that wave.

Speed = Wavelength × Distance

Speed = 100 × 10 = 1000 m/s.

So, the speed of the wave is 1000 m/s.

what are the statements? x

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.