Which of these statements accurately describe uses of ultrasound technology? Check all that apply.

It is unsafe to use for industrial applications.
It can be used to clean small items like jewelry.
It can be used to clean large items like machinery.
It increases the production time of everyday materials.
It cannot be used in the presence of liquids like water.

2 and 3

Explanation:

It can be used to clean small items like jewelry

It can be used to clean large items like machinery

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.

ya te mando la respuesta