I NEED HELP ASAP! Compare the spectrum of the unknown gas collected at the bulb company
1 answer:
The leaking gas is Neon.
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The gases commonly used in fluorescent light bulbs include Hydrogen, Helium, Neon, Argon, Krypton, Xenon.
Fluorescent lamps emit light of wavelength between 400 nm to 700 nm.
In the given chart the suspected gases in the bulb include;
Hydrogen (H), maximum wavelength (nm) = 410, 434, 86, 656
Helium (He), maximum wavelength, (nm) = 438, 443, 7, 471, 42, 501, 50, 587, 66.
Neon, (Ne), maximum wavelength, (nm) = 421, 423, 425, 436,
The leaking gas is determined as follows;
- For hydrogen the maximum wavelength fluctuated between 86 and 656, which caused the average of the maximum wavelength to be 396.5 nm. The average of the maximum wavelength is below the minimum wavelength of the Fluorescent lamp.
- For Helium, the maximum wavelength fluctuated between 7 and 587, which caused the average of the maximum wavelength to be 282.11 nm. The average of the maximum wavelength is below the minimum wavelength of the Fluorescent lamp.
- For Neon (Ne), the maximum wavelength is fairly constant and the average of the maximum wavelength is 426.25 nm. This value is above the minimum wavelength of the fluorescent lamps.
Thus, the leaking gas is Neon.
Learn more here: brainly.com/question/7388951
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The thermal expansion of the materials allows to find the deflection of the bimetallist strip is Δy = 3.48 cm
given paramers
* Bimetallic brass / steel tape
* Initial temperature, room temperature T = 20ºC
* Final temperature, boiling water = 100ºC
* initial length L₀ = 222mm (1cm / 10mm) = 22.2cm
* thickness of bimetallic tape e = 0.036 inch (2.54 cm/1 inch) = 0.0914 cm
to find
* perpendicular deviation or deflection (Δy)
Thermal expansion is the phenomenon of change in the length of a body due to the change in temperature, due to the increase in the length of the atomic and molecular bonds, macroscopically it is described by
ΔL = α L₀ ΔT
ΔL and ΔT are the variation of the length and temperature respectively, L₀ is the initial length and α the coefficient of expansion ends.
In this case we have a strip formed by two materials with different coefficient of thermal expansion,
Brass α_{brass} = 19 10⁻⁶ ºC⁻¹
Steel α_{steel} = 11 10⁻⁶ ºC⁻¹
In the attached we can see a diagram of the process, as the temperature increases, the material with greater thermal expansion lengthens more, so the system must curve towards the center of the material with less
thermal expansion. Let's find the length of the strip for each material
brass L_{f brass} - L₀ = α_{brass} L₀ ΔT
Steel L_{f steel} - L₀ = \alpha_{steel} L₀ ΔT
Note that the initial length is the same for the two materials and that the strip is in thermal equilibrium at room temperature.
If we assume that we have an arc of circumference, we can write the length of the arc
θ = L / r
where θ is the angle in radines, L the length of the arc and r the radius of curvature, let's write this equation for each material
brass L_{f \ brass} =θ r₁
steel L_{f \ steel} = θ r₂
we substitute in our equations
θ r₁ - L₀ = α_{brass} L₀ ΔT
θ r₂ - L₀ = α_{steel} L₀ ΔT
let's subtract the two equations
θ (r₁- r₂) = L₀ ΔT (α_{brass} - α_{steel})
the thickness of the strip is
e = r₁ -r₂
θ =
we calculate
θ =
θ = 0.155 rad
Let's use trigonometry to find the perpendicular deflection
tan θ = Δy / L₀
Δy = L₀ tan θ
Δy = 22.2 tan 0.155
Δy = 3.48 cm
Using the thematic expansion of the two materials we find the deflection of the bimetallist strip is 3.38 cm
Learn more about thermal expansion here: brainly.com/question/18717902
