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erica [24]
3 years ago
14

Can anybody help me with question number 28....☹

Physics
1 answer:
Alexxx [7]3 years ago
7 0

Answer:

A is glass, B is air, and C is water

Explanation:

n_air < n_water < n_glass

This makes sense, since solids are denser than liquids, and liquids are denser than gases.  Refractive index generally increases with density.

Snell's law states:

n₁ sin θ₁ = n₂ sin θ₂

What this means is the higher the index of refraction n, the lower the angle of incidence θ.

Media A has an angle of incidence of 15°.

Media B has an angle of incidence of 26°.

Media C has an angle of incidence of 21°.

Therefore, A is glass, B is air, and C is water.

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Answer:

A an Oxygen isotope

Explanation:

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The atomic number is 9 is the atom has 9 protons

Thus, the atom is an oxygen isotope

6 0
4 years ago
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Answer:

T_{f} = 85.7 ° C

Explanation:

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Where m is the evaporated mass (m = 2.00 103-3kg) and L is 2.26 106 J / kg, where we use the latent heat of the water

     Q₁ = 2.00 10⁻³ 2.26 10⁶

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Since the only form of energy transfer is terminated, the heat transferred is equal to the evaporated heat

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The coffee dough left in the cup after evaporation is

    M = 250 -2 = 248 g = 0.248 kg

   T_{f} -Ti = -Q1 / M c_{e}

   T_{f} = Ti - Q1 / M c_{e}

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     T_{f} = 90.0 - 4.52 103 / (0.248 4.186 103)

     T_{f} = 90- 4.35

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     T_{f} = 85.7 ° C

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