(refer to figure 34.) you have 80 gallons of usable avgas. you know it takes 20 gallons of
avgas for start, taxi, takeoff, descent, and landing. what would be your maximum cruise flight
time with day, vfr reserves?
given:
pressure altitude 6,000 ft
temperature 3 °c
power 2,400 rpm - 24" mp
a) 2 hours and 47 minutes.
b) 3 hours and 30 minutes.
c) 3 hours and 58 minutes.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Prove the equivalence between the two statements of the 2nd law of thermodynamics (i.e., a violation of one statement leads to the violatio the other statement)