All categories

2 years ago

10. What refrigerant is no longer manufactured in the United States?

Engineering

2 answers:

son4ous [18]2 years ago

6 0

Answer:

Freon Refrigerant Is Now Banned in the US

As of January 1, 2020, a once very popular air conditioning refrigerant can no longer be made in or imported into the United States.

Please give me brainliest - you get 25% as well! I swear!

irina [24]2 years ago

5 0

Answer:

Freon Refrigerant

Explanation:

As of January 1, 2020 Freon Refrigerant can no longer be manufactured or imported to the United States. This is because R-22 (the principal component in Freon) has been banned in the states. Along with other greenhouse gasses, due to their contribution to damaging Earth’s ozone layer and global warming.

hope this helps:)

You might be interested in

In poor weather, you should __ your following distance

Ratling [72]

Answer:

I think reduce your following distance

5 0

3 years ago

Read 2 more answers

Which type of container traps the most heat a shoe box covered in aluminum foil plastic wrap or wax paper?

Aliun [14]

Answer:

shoe box covered in aluminum foil

5 0

2 years ago

Oil with a density of 850 kg/m3 and kinematic viscosity of 0.00062 m2 /s is being discharged by a 5 mm diameter, 40 m long horiz

ra1l [238]

Answer:

Flow rate is $1.82\times 10^{-8} m^{3}/s$

Explanation:

Given information

Density of oil, $\rho_{oil}= 850 Kg/m^{3}$

kinematic viscosity, $v= 0.00062 m^{2} /s$

Diameter of pipe, D= 5 mm= 0.005 m

Length of pipe, L=40 m

Height of liquid, h= 3 m

Volume flow rate for horizontal pipe will be given by

$\bar v=\frac {\triangle P\pi D^{4}}{128\mu L}$ where $\mu$ is dynamic viscosity and $\triangle P$ is pressure drop

At the bottom of the tank, pressure is given by

$P_{bottom}=\rho_{oil} gh=850 Kg/m^{3}\times 9.81 m/s^{2}\times 3 m= 25015.5 N/m^{2}$

Since at the top pressure is zero, therefore change in pressure a difference between the pressure at the bottom and the top. It implies that change in pressure is still $25015.5 N/m^{2}$

Dynamic viscosity, $\mu=\rho_{oil}v= 850 Kg/m^{3}\times 0.00062 m^{2}/s=0.527 Kg/m.s$

Now the volume flow rate will be

$\bar v=\frac {25015.5 N/m^{2}\times \pi \times 0.005^{4}}{128\times 0.527 Kg/m.s \times 40}=1.82037\times 10^{-8} m^{3}/s\approx 1.82\times 10^{-8} m^{3}/s$

Proof of flow being laminar

The velocity of flow is given by

$V_{flow}=\frac {\bar v}{A}=\frac {1.82\times 10^{-8} m^{3}/s}{0.25\times \pi\times 0.005^{2}}=0.000927104 m/s$

Reynolds number, $Re=\frac {\rho_{oil} v_{flow} D}{\mu}=\frac {850 Kg/m^{3}\times 0.000927104 m/s\times 0.005}{0.527 kg/m.s}=0.007476648$

Since the Reynolds number is less than 2300, the flow is laminar and the assumption is correct.

5 0

3 years ago

Calculate moments about points A,B,C,D

poizon [28]

Answer:

24cm sureeeereereeeeee

3 0

2 years ago

In what units is fire resistance measured? How is the fire resistance of a building assembly determined?

Archy [21]

Answer:

Fire resistance is measured in hour.

Explanation:

The fire resistance of the structure is estimated in a number of hours during which material and a piece of the structure can oppose a fire. The fire resistance of a joining structure is dictated by the type of structure, the supporting dividers, the segments, the bars, and the supports. The table shows the fire resistance level of most of the structure's segments.

While deciding the level of free opposition, the cost will be higher. In this way, the structure is planned with the least tightness at the fire level authorized by the building law.

5 0

2 years ago