Air enters a steady flow turbine at 1600 K, 3000 kPa and the measured conditions at the exit are 1000 K and 100 kPa. The ambient temperature is 298 K. a) What is the maximum work that could be extracted out of this turbine

Explanation:

The detailed analysis and step by step calculation is as shown in the attached file.

b) The second question says what would be the work output if the turbine was assumed adiabatic.

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s