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2 years ago

(MC) What is the result of the Sun's light being refracted when it is high in the sky around noon?

2 answers:

Ivan2 years ago

5 0

The result of the Sun's light being refracted when it is high in the sky around noon is blue, indigo and violet are strongly bent that mostly skim through the upper atmosphere making the sky appear blue. The refraction of the light during noon makes the sky blue.

Fittoniya [83]2 years ago

5 0

Explanation:

Refraction is the phenomenon which occurs when there is change in the direction of the light while traveling from one medium to the another medium.

Our atmosphere consists of the rarer medium and denser medium. The light gets refracted from when it travels from the sun. Blue, indigo and violet are strongly bent than any other colors. The blue has a shorter wavelength. Blue light is scattered more by the tiny air molecules than any other colors. Therefore, the sky appear blue in noon.

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2 years ago

Calculate the change in entropy as 0.3071 kg of ice at 273.15 K melts. (The latent heat of fusion of water is 333000 J / kg)

Ostrovityanka [42]

Answer:

374.39 J/K

Explanation:

Entropy: This can be defined as the degree of disorder or randomness of a substance.

The S.I unit of entropy is J/K

ΔS = ΔH/T ..................................... Equation 1

Where ΔS = entropy change, ΔH = Heat change, T = temperature.

ΔH = cm................................... Equation 2

Where,

c = specific latent heat of fusion of water = 333000 J/kg, m = mass of ice = 0.3071 kg.

Substitute into equation 2

ΔH = 333000×0.3071

ΔH = 102264.3 J.

Also, T = 273.15 K

Substitute into equation 1

ΔS = 102264.3/273.15

ΔS = 374.39 J/K

Thus, The change in entropy = 374.39 J/K

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