Methane (chemical formula Ch4), an important greenhouse gas, has a nearly constant mixing ratio throughout the lower atmosphere
(0 - 15 km) of 2.1 ppm.
a. Using your knowledge of how the total pressure varies as a function of altitude, sketch and describe the vertical profile of the CH4 number density (i.e. a plot of altitude from 0-15 km on the y-axis and number density on the x-axis, describe the basic function). For this purpose, assume a constant atmospheric temperature of 250 K
a. Using your knowledge of how the total pressure varies as a function of altitude, sketch and describe the vertical profile of the CH4 number density (i.e. a plot of altitude from 0-15 km on the y-axis and number density on the x-axis, describe the basic function). For this purpose, assume a constant atmospheric temperature of 250 K
1 answer:
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Answer:
- the mass flow rate of air is 7.53 kg/s
- the exit area is 0.108 m²
Explanation:
Given the data in the question;
lets take a look at the steady state energy equation;
m" = W" / [ (h₁ - h₂ ) -
]
Now at;
T₁ = 900K, h₁ = 932.93 k³/kg
T₂ = 500 K, h₂ = 503.02 k³/kg
so we substitute, in our given values
m" = [ 3200 kW × ] / [ (932.93 - 503.02 )k³/kg -
|
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| ]
m" = 7.53 kg/s
Therefore, the mass flow rate of air is 7.53 kg/s
now, Exit area A₂ = v₂m" / V₂
we know that; pv = RT
so
A₂ = RT₂m" / P₂V₂
so we substitute
A₂ = {[ ×
×
] / [(1 bar)(100 m/s )]} |
||
A₂ = 0.108 m²
Therefore, the exit area is 0.108 m²
Answer:
diameter of brass portion is 42.6 mm.
Explanation:
see the attached file
Answer:
Explanation:
Thermal reservoir:
It is the body which have infinite amount of heat capacity and store large amount of heat.The temperature of thermal reservoir is constant and does not change with time.The temperature of thermal reservoir is not change even heat is going out from reservoir or heat going inside the reservoir.The temperature of thermal reservoir remains constant and does not depend on the surroundings.
