If a net force of 68.0N acts on a 4.05kg mass, what is acceleration?

Explanation:

Acceleration can be found by dividing the net force by the mass.

The net force is 68 Newtons. Let's change the units to make later steps simpler.

1 Newton is equal to 1 kg*m/s², so the net force of 68.0 Newtons is also equal to 68.0 kg*m/s².

The mass is 4.05 kilograms.

Substitute the values into the formula.

Divide. Note that the kilograms (kg) will cancel each other out when dividing.

Let's round to the nearest hundredth. The 0 in the thousandth place tells to leave the 9 in the hundredth place.

The acceleration is about 16.79 meters per square second.

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

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.