Answer:
Mechanical engineering is an engineering discipline that combines engineering physics and mathematics principles with materials science to design, analyze, manufacture, and maintain mechanical systems.
Answer: ok the best one would be letter s because it goes
Explanation:
467,,mm tubing should do
Answer:
Heater power = 425 watts
Explanation:
Detailed explanation and calculation is shown in the image below
Answer:
![P_m_i_n = 442KPA](https://tex.z-dn.net/?f=%20P_m_i_n%20%3D%20442KPA%20)
Explanation:
We are given:
m = 1.06Kg
![T_H = 1.2T_L](https://tex.z-dn.net/?f=%20T_H%20%3D%201.2T_L)
T = 22kj
Therefore we need to find coefficient performance or the cycle
![COP_R = \frac {1}{(T_R/T_l) -1}](https://tex.z-dn.net/?f=%20COP_R%20%3D%20%5Cfrac%20%7B1%7D%7B%28T_R%2FT_l%29%20-1%7D%20)
![= \frac {1 }{1.2-1}](https://tex.z-dn.net/?f=%20%3D%20%5Cfrac%20%7B1%20%7D%7B1.2-1%7D%20)
= 5
For the amount of heat absorbed:
![Q_l = COP_R Wm](https://tex.z-dn.net/?f=%20Q_l%20%3D%20COP_R%20Wm%20)
= 5 × 22 = 110KJ
For the amount of heat rejected:
![Q_H = Q_L + W_m](https://tex.z-dn.net/?f=%20Q_H%20%3D%20Q_L%20%2B%20W_m%20)
= 110 + 22 = 132KJ
[tex[ q_H = \frac{Q_L}{m} [/tex];
= ![= \frac{132}{1.06}](https://tex.z-dn.net/?f=%20%3D%20%5Cfrac%7B132%7D%7B1.06%7D%20)
= 124.5KJ
Using refrigerant table at hfg = 124.5KJ/Kg we have 69.5°c
Convert 69.5°c to K we have 342.5K
To find the minimum temperature:
;
![T_L = \frac{342.5}{1.2}](https://tex.z-dn.net/?f=%20T_L%20%3D%20%5Cfrac%7B342.5%7D%7B1.2%7D%20)
= 285.4K
Convert to °C we have 12.4°C
From the refrigerant R -134a table at
= 12.4°c we have 442KPa
Answer:
Hence, the three effects of electric current are heating effect, magnetic effect and chemical effect.