Answer:
The general rule of thumb is that the SMALLER a substance's atoms and the STRONGER the bonds, the harder the substance. Two of the strongest forms of chemical bonds are the ionic and covalent bonds.
Explanation:
Answer:
![Q=15.7Kw](https://tex.z-dn.net/?f=Q%3D15.7Kw)
Explanation:
From the question we are told that:
Initial Pressure ![P_1=4bar](https://tex.z-dn.net/?f=P_1%3D4bar)
Initial Temperature ![T_1=20 C](https://tex.z-dn.net/?f=T_1%3D20%20C)
Final Pressure ![P_2=12 bar](https://tex.z-dn.net/?f=P_2%3D12%20bar)
Final Temperature ![T_2=80C](https://tex.z-dn.net/?f=T_2%3D80C)
Work Output ![W= 60 kJ/kg](https://tex.z-dn.net/?f=W%3D%2060%20kJ%2Fkg)
Generally Specific Energy from table is
At initial state
![P_1=4bar \& T_1=20 C](https://tex.z-dn.net/?f=P_1%3D4bar%20%5C%26%20T_1%3D20%20C)
![E_1=262.96KJ/Kg](https://tex.z-dn.net/?f=E_1%3D262.96KJ%2FKg)
With
Specific Volume ![V'=0.05397m^3/kg](https://tex.z-dn.net/?f=V%27%3D0.05397m%5E3%2Fkg)
At Final state
![P_2=12 bar \& P_2=80C](https://tex.z-dn.net/?f=P_2%3D12%20bar%20%5C%26%20P_2%3D80C)
![E_1=310.24KJ/Kg](https://tex.z-dn.net/?f=E_1%3D310.24KJ%2FKg)
Generally the equation for The Process is mathematically given by
![m_1E_1+w=m_2E_2+Q](https://tex.z-dn.net/?f=m_1E_1%2Bw%3Dm_2E_2%2BQ)
Assuming Mass to be Equal
![m_1=m_1](https://tex.z-dn.net/?f=m_1%3Dm_1)
Where
![m=\frac{V}{V'}](https://tex.z-dn.net/?f=m%3D%5Cfrac%7BV%7D%7BV%27%7D)
![m=frac{0.06666}{V'=0.05397m^3/kg}](https://tex.z-dn.net/?f=m%3Dfrac%7B0.06666%7D%7BV%27%3D0.05397m%5E3%2Fkg%7D)
![m=1.24](https://tex.z-dn.net/?f=m%3D1.24)
Therefore
![1.24*262.96+60)=1.24*310.24+Q](https://tex.z-dn.net/?f=1.24%2A262.96%2B60%29%3D1.24%2A310.24%2BQ)
![Q=15.7Kw](https://tex.z-dn.net/?f=Q%3D15.7Kw)
I think option c 12 is currect
Answer:
All machines have three fundamental hazards: moving parts, point of operation, and the power transmission.
Explanation:
The unit that supplies power to the machine is a critical hazard due to high energy sources being potential fatal if proper protocols are not followed. This is why lockout tagout (LOTO) measures are put in place in order to protect people while they work on equipment.