Answer:
How to Prevent Computer Viruses: 9 Tips to Keep Your PC Safe
Use Strong Passwords. Let's start with the basics—your passwords. ...
Keep Everything up to Date. ...
Use Antivirus Software. ...
Use a Firewall. ...
Install a Popup Blocker. ...
Beware of Email Phishing Scams. ...
Educate Your Family & Staff. ...
Know the Signs of Infection.
Answer:
the isentropic efficiency of turbine is 99.65%
Explanation:
Given that:
Mass flow rate of LNG m = 20 kg/s
The pressure at the inlet = 3000 kPa
turbine temperature at the inlet = ( -160+273)K = 113K
The pressure at the turbine exit = 300 kPa
Power produced by the turbine W = 120 kW
Density of LNG
The formula for the workdone by an ideal turbine can be expressed by:
We all know that density = mass * volume i.e
Then ;
replacing it into the above previous derived formula; we have:
However ; the isentropic efficiency of turbine is given by the relation:
99.65%
Therefore, the isentropic efficiency of turbine is 99.65%
Answer:
Energy Transfer = 350 kJ
Explanation:
The net work can be determined from an energy balance. That is, with assumption
∆KE + ∆PE + ∆U = Q − W
Where
∆KE = ∆PE = 0 (Since There is no significant change in the kinetic or potential energy of the steam)
The net work is the sum of the work associated with the paddlewheel Wpw
and the work done on the piston Wpiston:
W = Wpw + Wpiston
From the given information, Wpw= −18.5 kJ,
Collecting results:
Wpw + Wpiston = Q − ∆U
Wpiston = Q − ∆U − Wpw= Q − m (u2− u1) − Wpw
Where Q=80kJ, m=5kg, u2 = 2659.6 kJ/kg, u1 = 2709.9 kJ/kg
= 80 kJ − 5 kg (2659.6 − 2709.9)kJ/kg − ( −18. 5 kJ)
= 350 kJ
Answer:
Solenoid switch is used to control high power circuits with the help of small electrical control signals for activating the switch.
It also allows a high power switching device to be restricted to a remote place.
These switches are normally used on engine starting systems within the automotive.
Explanation: