2. You are designing an airport for small planes and one kind of airplane that must use this airfield should reach a minimum speed of at least 100km/hr before takeoff and can accelerate
at least 2m/s?
a) If the runway length is 150m long, can this airplane reach the minimum speed before
takeoff?
b) If otherwise, determine the length that the runway should have for this plane to reach the
minimum required speed before takeoff.

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.