I think that it is all of the above
Answer:
2.7g
Explanation:
the mass of a brass axle that has a volume of 0.318 cm is 2.7g.
Answer:
B) 5.05
Explanation:
The wall thickness of a pipe is the difference between the diameter of outer wall and the diameter of inner wall divided by 2. It is given by:
Thickness of pipe = (Outer wall diameter - Inner wall diameter) / 2
Given that:
Inner diameter = ID = 25 ± 0.05, Outer diameter = OD = 35 ± 0.05
Maximum outer diameter = 35 + 0.05 = 35.05
Minimum inner diameter = 25 - 0.05 = 24.95
Thickness of pipe = (maximum outer wall diameter - minimum inner wall diameter) / 2 = (35.05 - 24.95) / 2 = 5.05
or
Thickness = (35 - 25) / 2 + 0.05 = 10/2 + 0.05 = 5 + 0.05 = 5.05
Therefore the LMC wall thickness is 5.05
Answer:Counter,
0.799,
1.921
Explanation:
Given data
![T_{h_i}=200^{\circ}C](https://tex.z-dn.net/?f=T_%7Bh_i%7D%3D200%5E%7B%5Ccirc%7DC)
![T_{h_o}=120^{\circ}C](https://tex.z-dn.net/?f=T_%7Bh_o%7D%3D120%5E%7B%5Ccirc%7DC)
![T_{c_i}=100^{\circ}C](https://tex.z-dn.net/?f=T_%7Bc_i%7D%3D100%5E%7B%5Ccirc%7DC)
![T_{c_o}=125^{\circ}C](https://tex.z-dn.net/?f=T_%7Bc_o%7D%3D125%5E%7B%5Ccirc%7DC)
Since outlet temperature of cold liquid is greater than hot fluid outlet temperature therefore it is counter flow heat exchanger
Equating Heat exchange
![m_hc_{ph}\left [ T_{h_i}-T_{h_o}\right ]=m_cc_{pc}\left [ T_{c_o}-T_{c_i}\right ]](https://tex.z-dn.net/?f=m_hc_%7Bph%7D%5Cleft%20%5B%20T_%7Bh_i%7D-T_%7Bh_o%7D%5Cright%20%5D%3Dm_cc_%7Bpc%7D%5Cleft%20%5B%20T_%7Bc_o%7D-T_%7Bc_i%7D%5Cright%20%5D)
=![\frac{125-100}{200-120}=\frac{25}{80}=C\left ( capacity rate ratio\right )](https://tex.z-dn.net/?f=%5Cfrac%7B125-100%7D%7B200-120%7D%3D%5Cfrac%7B25%7D%7B80%7D%3DC%5Cleft%20%28%20capacity%20rate%20ratio%5Cright%20%29)
we can see that heat capacity of hot fluid is minimum
Also from energy balance
![Q=UA\Delta T_m=\left ( mc_p\right )_{h}\left ( T_{h_i}-T_{h_o}\right )](https://tex.z-dn.net/?f=Q%3DUA%5CDelta%20T_m%3D%5Cleft%20%28%20mc_p%5Cright%20%29_%7Bh%7D%5Cleft%20%28%20T_%7Bh_i%7D-T_%7Bh_o%7D%5Cright%20%29)
=![\frac{\left ( T_{h_i}-T_{h_o}\right )}{T_m}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cleft%20%28%20T_%7Bh_i%7D-T_%7Bh_o%7D%5Cright%20%29%7D%7BT_m%7D)
![T_m=\frac{\left ( 200-125\right )-\left ( 120-100\right )}{\ln \frac{75}{20}}](https://tex.z-dn.net/?f=T_m%3D%5Cfrac%7B%5Cleft%20%28%20200-125%5Cright%20%29-%5Cleft%20%28%20120-100%5Cright%20%29%7D%7B%5Cln%20%5Cfrac%7B75%7D%7B20%7D%7D)
![T_m=41.63^{\circ}C](https://tex.z-dn.net/?f=T_m%3D41.63%5E%7B%5Ccirc%7DC)
NTU=1.921
![And\ effectiveness \epsilon =\frac{1-exp\left ( -NTU\left ( 1-c\right )\right )}{1-c\left ( -NTU\left ( 1-c\right )\right )}](https://tex.z-dn.net/?f=And%5C%20effectiveness%20%5Cepsilon%20%3D%5Cfrac%7B1-exp%5Cleft%20%28%20-NTU%5Cleft%20%28%201-c%5Cright%20%29%5Cright%20%29%7D%7B1-c%5Cleft%20%28%20-NTU%5Cleft%20%28%201-c%5Cright%20%29%5Cright%20%29%7D)
![\epsilon =\frac{1-exp\left ( -1.921\left ( 1-0.3125\right )\right )}{1-0.3125exp\left ( -1.921\left ( 1-0.3125\right )\right )}](https://tex.z-dn.net/?f=%5Cepsilon%20%3D%5Cfrac%7B1-exp%5Cleft%20%28%20-1.921%5Cleft%20%28%201-0.3125%5Cright%20%29%5Cright%20%29%7D%7B1-0.3125exp%5Cleft%20%28%20-1.921%5Cleft%20%28%201-0.3125%5Cright%20%29%5Cright%20%29%7D)
![\epsilon =\frac{1-exp\left ( -1.32068\right )}{1-0.3125exp\left ( -1.32068\right )}](https://tex.z-dn.net/?f=%5Cepsilon%20%3D%5Cfrac%7B1-exp%5Cleft%20%28%20-1.32068%5Cright%20%29%7D%7B1-0.3125exp%5Cleft%20%28%20-1.32068%5Cright%20%29%7D)
![\epsilon =\frac{1-0.2669}{1-0.0834}](https://tex.z-dn.net/?f=%5Cepsilon%20%3D%5Cfrac%7B1-0.2669%7D%7B1-0.0834%7D)
![\epsilon =0.799](https://tex.z-dn.net/?f=%5Cepsilon%20%3D0.799)
Wait why do you want me to