A rock is projected from the edge of the top of a building with an initial velocity of 12.2 m/s at an angle of 73° above the horizontal. The rock strikes the ground a horizontal distance of 25 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. What is the time?

7 s

Explanation:

u = Initial velocity of rock = 12.2 m/s

= Angle of throw =

x = Displacement in x direction = 25 m

Displacement in x direction is given by

Time taken to reach the ground is 7 s.

Explanation :

The electromagnetic spectrum shows the frequencies and the corresponding wavelength of electromagnetic radiation. It starts from gamma rays and ends at radio waves.

The frequency of gamma rays is higher while the frequency of radio waves is least.

The sequence of the spectrum is as follows :

Hence, it is clear that Ultraviolet rays have more frequency than visible light.

The correct option is (E).