Answer:
(a) [tex]\dot V_1[/tex] = 0.308 m³/s
(b) [tex]\dot m[/tex] = 0.732 kg/m³
(c) v₂ = 5.94 m/s.
Explanation:
(a) The volume flow rate is given by the cross sectional area of the pipe × Velocity of flow of air
Diameter of pipe = 28 cm = 0.28 m
The cross sectional area, A, of the pipe = 0.28²/4×π = 0.0616 m²
Volume flow rate = 5 × 0.0616 = 0.308 m³/s
[tex]\dot V_1[/tex] = 0.308 m³/s
(b) From the general gas equation, we have;
p₁v₁ = RT₁ which gives;
p₁/ρ₁ = RT₁
ρ₁ = p₁/(RT₁)
Where:
ρ₁ = Density of the air
p₁ = 200 kPa
T₁ = 20 C =
R = 0.287 kPa·m³/(kg·K)
ρ₁ = 200/(0.287 ×293.15) = 2.377 kg/m³
The mass flow rate = Volume flow rate × Density
The mass flow rate, [tex]\dot m[/tex] = 2.377×0.308 = 0.732 kg/m³
[tex]\dot m[/tex] = 0.732 kg/m³
(c) The density at exit, ρ₂, is found from the the universal gas equation as follows;
ρ₂ = p₂/(RT₂)
Where:
p₂ = Pressure at exit = 180 kPa
T₂ = Exit temperature = 40°C = 273.15 + 40 = 313.15 K
∴ ρ₂ = 180/(0.287×313.15) = 2.003 kg/m³
[tex]\dot m[/tex] = ρ₂×[tex]\dot V_2[/tex]
[tex]\dot V_2[/tex] = [tex]\dot m[/tex]/ρ₂ = 0.732/2.003 = 0.366 m³/s
[tex]\dot V_2[/tex] = v₂ × A
v₂ = [tex]\dot V_2[/tex]/A = 0.366/0.0616 = 5.94 m/s.
v₂ = 5.94 m/s.
When adjusting your side mirrors, the horizon should be _______ the mirror. A. above the center of B. across the center of C. below the center of D. directly behind
Answer:
B. ACROSS THE CENTER OF
Trust me I've seen this before
Hope this is correct
HAVE A GOOD DAY!
Answer:
B, across the center
Explanation:
Royce has a Bevel protractor with a damaged vernier scale. What limitation will Royce face if he uses this protractor to measure angles?
Answer:
Limitation in the level of possible accuracy of the that can be obtained to mainly whole degrees
Explanation:
The angle measurement values are located around the circularly shaped bevel protractor to which a Vernier scale can be attached to increase the accuracy of the angle measurement reading
The accuracy of the bevel protractor is up to 5 arc minutes or 1/12° with the space on the Vernier scale having graduations of 1/12°, such that two spaces on the main scale is 5 arc minutes more than a space on the Vernier scale and the dimensions of the coincidence of the two scale will have an accuracy of up to 1/12°
Therefore, whereby the Vernier scale is damaged, the accuracy will be limited to the accuracy main scale reading in whole degrees.
answer this question fast
Answer:
When the expenditure increased, then the consumer's expenditure is increased to Rs.150 and when the price falls of the good it becomes Rs.5. Then, Good X will be Rs.10.
last question:If the Good X falls by 20%, then, it will be Rs.2, and according to his demand 100 units will be equal to Rs.200.
cause if one unit=rs.2, then 100units=100×2=200.
BHE:FLI:JPM next sequence
Answer:
NTQ
Explanation:
The given sequence is
BHE : FLI : JPM
If is clear that, alphabets on first places are B, F, J. Difference between their place vales is 4.
B+4=F,F+4=J ; so alphabet on first place of next term of sequence is J+4=N.
Similarly, alphabets on second places are H, L, P. Difference between their place vales is 4.
H+4=L,L+4=P ; so alphabet on second place of next term of sequence is P+4=T.
Alphabets on third places are E, I, M. Difference between their place vales is 4.
E+4=I,I+4=M ; so alphabet on third place of next term of sequence is M+4=Q.
Therefore, the next term is NTQ.
Two technicians are discussing cylinder- testing. Technician A says that when testing the power level of a specific cylinder using a Power balance test, it's best to ground it's secondart current. Technician B says that it's best to disconnect one spark plugs wire at a time to test cylinder power levels. Who is correct?
Answer:
Technician B is the answer
Am I the only one who cannot see the answers?? Does anybody know how to solve this?
Answer:
no, it seems that everyone is having the same issue. If you use the app you can still find the answers and see them.
Explanation: