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lisov135 [29]
3 years ago
13

Aluminum foil has a shiny side and a dull side. Many experts believe that the shiny side of the aluminum foil should face the fo

od when you are using it to cover the food. What process would explain the reason why the shiny side should face the food?
A) conduction.
B) convection.
C) insulation.
D) radiation.
Physics
2 answers:
Goshia [24]3 years ago
5 0

Answer: D) Radiation.

Explanation: The shiny side of the aluminum foil is better at reflecting electromagnetic waves or radiation, so if this side faced the other side, it will prevent some radiated heat to reach the food, which is counterproductive.

When this side faces the food, it also prevents the heat radiated from the food to leave it, so it is actually beneficial.

So the correct answer of why this side should face the food is option D) Radiation

ra1l [238]3 years ago
3 0

Answer:

C

Explanation:

Insulation

Aluminum foil are really good at keeping the food warm because of its insulation property that it does not let the heat of food go out

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Explanation:

Given,

Nonreflective coating refractive index : n = 1.21

Index of refraction: n_0 = 1.52

Wave length of light = λ = 570 nm = 570\times10^{-9}\ m

\text{ Thickness}=\dfrac{\lambda}{4n}

=\dfrac{570\times10^{-9}\ m}{4\times1.21}\\\\\approx\dfrac{117.8\times 10^{-9}\ m}{1}\\\\=117.8\text{ nm}

Hence, the minimum thickness of the coating that will accomplish= 117.8 nm

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Answer;

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There are two types of cell division. Mitosis is used for growth and repair and produces diploid cells identical to each other and the parent cell. Meiosis is used for sexual reproduction and produces haploid cells different to each other and the parent cell.

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