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<span>The wavelength of a proton traveling at a speed of 6.21 km/s is
wavelength = (6.63E-34 Js) / (1.67Eâ’27kg x 6.21E3m/s)
= 6.393E-9 m
Region of the spectrum for electromagnetic radiation of this wavelength will be Xrays.</span>
Answer:
4.416 W/m²
Explanation:
Malus' law is given mathematically as
I = I₀ cos² θ
For the first polarizer, θ = 60°
I₁ = I₀ cos² 60°
I₁ = I₀ (0.5)² = 0.25I₀
For the second polarizer, θ = 20°
I₂ = I₁ cos² 20°
I₂ = I₁ (0.9397)² = 0.883 I₁
I₂ = 0.883 × 0.25I₀ = 0.2208 I₀
Note that
I₀ = 20 W/m²
I₂ = 0.2208 × 20 = 4.416 W/m²
Hope this Helps!!!
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Explanation:
The answer is CFC – 22 or HCFC - 22. To locate leaks, it is
easily accomplished using a pressure – regulated dry nitrogen charge with CFC –
22. But some technicians prefer to use Refrigerant – 22 (HCFC – 22) to
pressurize the system without the use of nitrogen. CFC – 22 is also known as Chlorodifluoromethane.
This is a hydrochlorofluorocarbon (HCFC). This is better recognized as HCFC-22, or R-22. It is usually
used as a propellant and refrigerant. While HCFC
– 22 is also known as class II hydrochlorofluorocarbon refrigerant that is less
harmful to the ozone than R -12. If HCFC – 22 is used for leak testing, all
refrigerant must be first detached from the system. After the leak test, HCFC –
22 should be remove before putting any other refrigerant. Do not mix refrigerants.
Both HCFC – 22 and R -134a fall into the kind of refrigerants known as
combustible. If exposed to oxygen, they will burn when under pressure or
exposed to high temperatures.
