Answer:
a. Irreversible
b. Impossible
c. Impossible
Explanation:
to determine if a case is reversible, irreversible or impossible we compare the actual efficiency to the maximum efficiency of each case
maximum efficiency of the power cycle
nmax = 1 - TC/TH
nmax = 1 - 400/1200
Check attachment for complete solution
Answer:
36V, 100A-hr
Explanation:
Since the batteries are connected in series;
i. the output voltage will be the sum of the individual voltages
ii. the current rating (A-hr) will be the same as their individual current rating (A-hr). And this is because the same current flows through the batteries.
From i,
The output voltage, V, is given by the sum of the voltages of the three batteries;
V = 12V + 12V + 12V
V = 36V
From ii,
The A-hr capacity of the connection is the same as that of the individual batteries;
100 A-hr
Therefore, the output voltage and A-hr capacity of this connection is:
36V, 100A-hr
TRUE
An airtightness test it’s a whole building test that measures how easy it is for air to leak through a building enclosure or “skin” one common method is to use a large fan or “blower” to extract air from or supply air to the building.
