Rainwater was collected in water collectors at thirty different sites near an industrial basin and the amount of acidity (pH lev
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Answer:
a) W=85.225 kW
b)
Explanation:
First, consider the energy balance for the compressor: The energy that enters to the system (W and enthalpy of the feed flow) is equal to the energy that goes out from it (Heat Q and enthalpy of the exit flow):
Consider the enthalpy data from van Wylen 6th edition, Table B.2.2. According to that, ,
So, the power input to the compressor is:
b) The differential entropy change dS for a reversible heat transfer dQ at a temperature T is:
This equation can be integrated if the heat transfer surface temperature remains constant, which is the case, giving as a result:
The impulse of the boxers punch is 28 kgm/s.
The given parameters;
- <em>applied force by the boxer, F = 1400 N</em>
- <em>time of force action, t = 0.02 s</em>
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The impulse of the boxers punch is calculated as follows;
where;
- <em>F is the applied force (N)</em>
- <em>t is the time of force action (s)</em>
The magnitude of the impulse is calculated as follows;
Thus, the impulse of the boxers punch is 28 kgm/s.
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