What are the main causes of injuries when using forklifts?
2 answers:
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Answer:
Test code:
>>u=10;
>>g=9.8;
>>q=100;
>>m0=100;
>>vstar=10;
>>tstar=fzero_rocket_example(u, g, q, m0, vstar)
Explanation:
See attached image
Answer:
(a) The power input to the compressor:
(b) The volume flow rate of the refrigerant at the compressor inlet:
Explanation:
(a)
We need to check the values of enthalpy (as we have an open system) for both states, being the inlet, state 1 and the outlet, state 2. We will know these values by checking the vapor charts of R134a, I used the ones found in Thermodynamics of Cengel, 7th edition.
Then, our values are:
Now we proceed to know the work with the following expression:
Now we replace values and our result is:
(b)
To know the volume rate at the compressor inlet, we need to know the specific volume in that phase, as we have that is saturated and at -24°C, we can read our table:
With our specific volume and the mass rate, we can calculate the volume rate: