Answer:
The efficiency of this ideal and reversible engine is 85 percent.
The efficiency of the Carnot cycle represents the efficiency of a thermal machine with no irreversibilities, hence, it is impossible for any real engine operating between the two reservoirs cannot be more efficient than this engine.
Explanation:
Let assume that the temperature of the atmosphere is 300 K. From Thermodynamics we know that the efficiency of the Carnot's cycle (), dimensionless, is:
(1)
Where:
- Temperature of the kerosene combustor (hot reservoir), measured in kelvins.
- Temperature of the atmosphere (cold reservoir), measured in kelvins.
If we know that and , then the efficieny of this ideal and reversible engine is:
The efficiency of this ideal and reversible engine is 85 percent.
The efficiency of the Carnot cycle represents the efficiency of a thermal machine with no irreversibilities, hence, it is impossible for any real engine operating between the two reservoirs cannot be more efficient than this engine.
Answer:
maybe it's twang because of the blade tension
Answer: Regardless of feature size (RFS)
Explanation:
It is a pre-selected condition for every geometric tolerance which is the second rule of GD&T and it requires no repairs, it is adopted when size feature has no effect on defined tolerance. RFS implies that GD&T callout is not dependent on size dimension. Least Material Condition (LMC) cancels out this rule.
•Reasons for using RFS.
1. It can not be easily determined.
2. It can be used anytime but can be ignored if it is specified.