What is the pressure of a 300 lb. object on a 100 sq. in. area?
1 answer:
Answer:
D. 3 psi
Explanation:
Pressure is defined as force acting per unit area and is numerically expressed as:
where P represent pressure, F is force and A is area where the force acts. Substituting 300 lb for force and 100 sq.in for area then pressure,
Therefore, from the choices given, option D, 3psi is the right choice.
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Answer:
Explanation:
Check attachment for solution
Given that, .
The initial gas pressure is
P1 = 3 MPa
The initial gas temperature
T1 = 300°C
The final gas pressure is
P2 = 80 KPa
Which are of two choices
1. Air with an isentropic expansion of 90% efficiency
2. Neon with an isentropic expansion of 80% efficiency
We want to know which will produce more work
Answer:
27.95[kW*min]
Explanation:
We must remember that the power can be determined by the product of the current by the voltage.
where:
P = power [W]
V = voltage [volt]
I = amperage [Amp]
Now replacing:
Now the energy consumed can be obtained mediate the multiplication of the power by the amount of time in operation, we must obtain an amount in Kw per hour [kW-min]