Grant sprints 50\,\text m50m50, start text, m, end text to the right with an average velocity of 3.0\,\dfrac{\text m}{\text s}3.0 s m 3, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. How many seconds did Grant sprint?

16.67 s

Explanation:

Given that the

Grant sprints 50m to the right with an average velocity of 3 m/s.

According to definition of speed,

Speed = distance/time

Substitute speed and distance into the formula.

3 = 50 / t

Make time t the subject of formula

t = 50 / 3

t = 16.667 seconds

Therefore, the number of seconds the Grant sprint is 16.7 s approximately.

the answer would be c. motion and direction

i hope this : )

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.