Answer:
The correct option is (e) η = 0.66
Explanation:
given data:
temperature at entry is 627 degree C
temperature at exit is 27 degree C
the efficiency of a engine is given as η
where 
is temperature in kelvin at exit point
is temperature in kelvin at entry point
η = 66.66 %
Answer:
An airfoil creates lift by exerting a downward force on the air as it flows past
Answer: The uncertainty in the measurements is 4%
Explanation: uncertainty is the doubt or level of not being sure about an outcome or a result.
Because the volume of the cylinder is gotten by measuring length and diameter of the cylinder, using a micrometer that has a 0.5% uncertainty, this will cause the measurements of each value to have a 0.5% uncertainty.
Therefore, since the length has 0.5% uncertainty and the diameter has 0.5% uncertainty too.
The uncertainty in the measurement will be.
0.5% + 0.5% = 1%
Since we are told that this measurement was carried out in four different locations, that means the uncertainty will become;
1% × 4 = 4%
As the number of locations increases, the uncertainty in the measurement will increase as well.
Answer:
Explanation:
A tension or current expressed in cosine form and with a positive sign can be converted directly into a phasor. This is done by indicating the tension and the offset angle:
So:
You can sum the phasors simply using a calculator, however, let's do it manually:
Let's find the rectangular form of each phasor using the next formulas:
For 
So:
For 
So:
Hence:
Finally:
Answer:
Carbon dioxide temperature at exit is 317.69 K
Carbon dioxide flow rate at heater exit is 20.25 m³/s
Explanation:
Detailed steps are attached below.
