The velocity of 16 m s-1 at an angle 0 to the horizontal. When the ball reaches its maximum height, its kinetic energy is 16 J.
A. What is the maximum height achieved by the ball from its point of release?
B. Calculate the initial vertical velocity of the ball.
C. What is the value of 0?
D. What is the speed of the ball after 1.0 s?
E. What is the displacement of the ball after 1.0s?
F. How long after the ball is thrown will it return to the ground?
G Calculate the horizontal distance that the ball will travel during its flight.

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.