Answer:
Given,
Temperature;
T = 393;;K
Convert to Celcius;
T = (393-273) degrees
T = 120°C
Using Table A-4 (Saturated water - Temperature table), at T = 120 C;
vf = 0.001060 m³/kg
vg = 0.89133 m³/kg
Quality is given as;
75% = 0.75
Specific volume is given as;
v = vf + x (vg - vf) = 0.001060 + 0.75(0.89133 _ 0.001060)
v= 0.66876 m³/kg
We know;
v = V/m
0.66876 = 100/m
m = 149.53 kg
Answer: ![10.631\times 10^3\ N/m^2](https://tex.z-dn.net/?f=10.631%5Ctimes%2010%5E3%5C%20N%2Fm%5E2)
Explanation:
Given
Discharge is ![Q=12.5\ L](https://tex.z-dn.net/?f=Q%3D12.5%5C%20L)
Diameter of pipe ![d=150\ mm](https://tex.z-dn.net/?f=d%3D150%5C%20mm)
Distance between two ends of pipe ![L=800\ m](https://tex.z-dn.net/?f=L%3D800%5C%20m)
friction factor ![f=0.008](https://tex.z-dn.net/?f=f%3D0.008)
Average velocity is given by
![\Rightarrow v_{avg}=\dfrac{12.5\times 10^{-3}}{\frac{\pi }{4}(0.15)^2}\\\\\Rightarrow v_{avg}=\dfrac{15.9134\times 10^{-3}}{2.25\times 10^{-2}}\\\\\Rightarrow v_{avg}=7.07\times 10^{-1}\\\Rightarrow v_{avg}=0.707\ m/s](https://tex.z-dn.net/?f=%5CRightarrow%20v_%7Bavg%7D%3D%5Cdfrac%7B12.5%5Ctimes%2010%5E%7B-3%7D%7D%7B%5Cfrac%7B%5Cpi%20%7D%7B4%7D%280.15%29%5E2%7D%5C%5C%5C%5C%5CRightarrow%20v_%7Bavg%7D%3D%5Cdfrac%7B15.9134%5Ctimes%2010%5E%7B-3%7D%7D%7B2.25%5Ctimes%2010%5E%7B-2%7D%7D%5C%5C%5C%5C%5CRightarrow%20v_%7Bavg%7D%3D7.07%5Ctimes%2010%5E%7B-1%7D%5C%5C%5CRightarrow%20v_%7Bavg%7D%3D0.707%5C%20m%2Fs)
Pressure difference is given by
![\Rightarrow \Delta P=f\ \dfrac{L}{d}\dfrac{\rho v_{avg}^2}{2}\\\\\Rightarrow \Delta P=0.008\times \dfrac{800}{0.15}\times \dfrac{997\times (0.707)^2}{2}\\\\\Rightarrow \Delta P=10,631.45\ N/m^2\\\Rightarrow \Delta P=10.631\ kPa](https://tex.z-dn.net/?f=%5CRightarrow%20%5CDelta%20P%3Df%5C%20%5Cdfrac%7BL%7D%7Bd%7D%5Cdfrac%7B%5Crho%20v_%7Bavg%7D%5E2%7D%7B2%7D%5C%5C%5C%5C%5CRightarrow%20%5CDelta%20P%3D0.008%5Ctimes%20%5Cdfrac%7B800%7D%7B0.15%7D%5Ctimes%20%5Cdfrac%7B997%5Ctimes%20%280.707%29%5E2%7D%7B2%7D%5C%5C%5C%5C%5CRightarrow%20%5CDelta%20P%3D10%2C631.45%5C%20N%2Fm%5E2%5C%5C%5CRightarrow%20%20%5CDelta%20P%3D10.631%5C%20kPa)
Answer:
Q=36444.11 Btu
Explanation:
Given that
Initial temperature = 60° F
Final temperature = 110° F
Specific heat of water = 0.999 Btu/lbm.R
Volume of water = 90 gallon
Mass = Volume x density
![1\ gallon = 0.13ft^3](https://tex.z-dn.net/?f=1%5C%20gallon%20%3D%200.13ft%5E3)
Mass ,m= 90 x 0.13 x 62.36 lbm
m=729.62 lbm
We know that sensible heat given as
Q= m Cp ΔT
Now by putting the values
Q= 729.62 x 0.999 x (110-60) Btu
Q=36444.11 Btu
Answer: The exit temperature of the gas in deg C is
.
Explanation:
The given data is as follows.
= 1000 J/kg K, R = 500 J/kg K = 0.5 kJ/kg K (as 1 kJ = 1000 J)
= 100 kPa, ![V_{1} = 15 m^{3}/s](https://tex.z-dn.net/?f=V_%7B1%7D%20%3D%2015%20m%5E%7B3%7D%2Fs)
![T_{1} = 27^{o}C = (27 + 273) K = 300 K](https://tex.z-dn.net/?f=T_%7B1%7D%20%3D%2027%5E%7Bo%7DC%20%3D%20%2827%20%2B%20273%29%20K%20%3D%20300%20K)
We know that for an ideal gas the mass flow rate will be calculated as follows.
![P_{1}V_{1} = mRT_{1}](https://tex.z-dn.net/?f=P_%7B1%7DV_%7B1%7D%20%3D%20mRT_%7B1%7D)
or, m = ![\frac{P_{1}V_{1}}{RT_{1}}](https://tex.z-dn.net/?f=%5Cfrac%7BP_%7B1%7DV_%7B1%7D%7D%7BRT_%7B1%7D%7D)
=
= 10 kg/s
Now, according to the steady flow energy equation:
![mh_{1} + Q = mh_{2} + W](https://tex.z-dn.net/?f=mh_%7B1%7D%20%2B%20Q%20%3D%20mh_%7B2%7D%20%2B%20W)
![h_{1} + \frac{Q}{m} = h_{2} + \frac{W}{m}](https://tex.z-dn.net/?f=h_%7B1%7D%20%2B%20%5Cfrac%7BQ%7D%7Bm%7D%20%3D%20h_%7B2%7D%20%2B%20%5Cfrac%7BW%7D%7Bm%7D)
![C_{p}T_{1} - \frac{80}{10} = C_{p}T_{2} - \frac{130}{10}](https://tex.z-dn.net/?f=C_%7Bp%7DT_%7B1%7D%20-%20%5Cfrac%7B80%7D%7B10%7D%20%3D%20C_%7Bp%7DT_%7B2%7D%20-%20%5Cfrac%7B130%7D%7B10%7D)
![(T_{2} - T_{1})C_{p} = \frac{130 - 80}{10}](https://tex.z-dn.net/?f=%28T_%7B2%7D%20-%20T_%7B1%7D%29C_%7Bp%7D%20%3D%20%5Cfrac%7B130%20-%2080%7D%7B10%7D)
= 5 K
= 5 K + 300 K
= 305 K
= (305 K - 273 K)
= ![32^{o}C](https://tex.z-dn.net/?f=32%5E%7Bo%7DC)
Therefore, we can conclude that the exit temperature of the gas in deg C is
.
Answer:
Option B: An MSDS
Explanation:
A dictionary is used to check up the meaning of general words and not for checking if a substance being used is hazardous. Option A is wrong.
MSDS means "Material Safety Data Sheet" and it contains documents with information that relates to occupational health & safety for checking various substances and products. Thus, option B is correct.
SAE stands for Society of Automotive Engineering and their standards pertain to mainly Automobiles. Thus option C is wrong.
EPA guidelines are mainly for checking facility and environmental health and safety compliance. Thus, option D is wrong.