3 years ago

What does air quality measure?

Engineering

1 answer:

alexgriva [62]3 years ago

3 0

Answer:

How clean or polluted the air is

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A gas cylinder is connected to a manometer that contains water. The other end of the manometer is open to the atmosphere, which

horrorfan [7]

Answer: the absolute static pressure in the gas cylinder is 82.23596 kPa

Explanation:

Given that;

patm = 79 kPa, h = 13 in of H₂O,

A sketch of the problem is uploaded along this answer.

Now

pA = patm + 13 in of H₂O ( h × density × g )

pA= 79 + (13 × 0.0254 × 9.8 × 1000/1000)

pA = 82.23596 kPa

the absolute static pressure in the gas cylinder is 82.23596 kPa

4 0

4 years ago

A certain power-supply filter produces an output with a ripple of 100 mV peak-to-peak and a dc value of 20 V. The ripple factor

Oksanka [162]

Answer: the ripple factor is 0.005

Explanation:

Given the data in the question;

we know that expression of ripple factor is;

r = Vr(pp) / Vdc

where Vr(pp) the peak to peak is ripple voltage ( 100mv = 0.1 V)

and Vdc is the dc value of the filter output voltage ( 20 V)

so we substitute our given values;

r = 0.1 / 20

r = 0.005

Therefore; the ripple factor is 0.005

8 0

3 years ago

Select the correct answer. Which material is commonly preferred for detailed projects such as connectors, jewelry, or small part

Naya [18.7K]

Answer:

the mean time I was wondering if you have any questions or need any further information please contact me at the mean time

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3 years ago

Consider the control volume form of the basic laws. For the conservation of mass form for a control volume with mass flow into a

aleksandrvk [35]

Answer:

C) Dependent on the mass flows in and out.

Explanation:

Lets take control volume(CV)

Take

$m_i$ =inlet mass flow rate

$m_e$ =exit mass flow rate

If we take unsteady flow process then inlet mass can not be equal to exit mass.Some mass can store if inlet mass flow rate is high and exit mass flow rate is low.

So mass of control volume

$m_{cv}=m_i-m_e$ .

so above we can say that mass of control volume dependent on inlet and exit mass.

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3 years ago

Consider a venture with a small hole drilled in the side of the throat. This hole is connected via a tube to a closed reservoir.

dangina [55]

Answer:

1913meter per second square.

Explanation:

From the Context the vacuum can be said be the presence of 5e difference below the outside ambient temperature.

For the Venturi.

Please go through the attached file for the rest of the solutions and the answer.

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3 years ago