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Svetllana [295]
3 years ago
7

A 750-newton person stands in an elevator that isaccelerating downward. The upward force of theelevator floor on the person must

be(1) equal to 0 N (3) equal to 750 N(2) less than 750 N (4) greater than 750 N
Physics
1 answer:
Margaret [11]3 years ago
7 0
(2)<span>less than 750 N.( if the downward acceleration of elevator were g,then answer would be 0 N.)</span>
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P2O5 is a covalent compound used to purify sugar. What is the name of this compound?
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B) Diphosphorus pentoxide

Explanation:

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Which best compares and contrasts Banking and Investment Planning?
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Explanation:

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Determine which heat transfers below are due to the process of conduction. I) You walk barefoot on the hot street and it burns y
Rudik [331]

I) You walk barefoot on the hot street and it burns your toes.

The road is in direct contact with your skin. Thermal energy from the road will transfer to the bottom of your feet, then to the rest of your body. This is an example of conduction.


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IV) A boy sits to the side of a campfire. He is 10 feet away, but still feels warm.

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The answer is A) 1 and 2.

3 0
3 years ago
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Light of wavelength 425.0 nm in air falls at normal incidence on an oil film that is 850.0 nm thick. The oil is floating on a wa
creativ13 [48]

Answer:

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in the water film    λ = 319.55 10⁻⁹ m

Explanation:

When electromagnetic radiation reaches a material, its propagation is by a process that we call absorption and reflection,

when light reaches a surface it has a mass much greater than the mass of the photons (m = 0), therefore there is an elastic collision where the frequency does not change, due to the speed of light in the material medium changes, therefore the only possibility is that the wavelength in the material changes, to maintain the relationship

             v = λ f

in the void we have

             c = λ₀ f

we divide the two expression

            c / v = λ₀ / λ

the refractive index is

             

              n = c / v

              n = λ₀ /λ

              λ = λ₀ / n

let's calculate

in oil film

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in the water film

            λ = 425 10⁻⁹ / 1.33

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those wavelengths are in the ultraviolet

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What would happen if i put in different colors in the washer with hot water?
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