Molecular Physics | Thermodynamics Answers

In a gas turbine unit air is drawn in at 1.02 bar and 15°C, and is compressed to 6.12 bar. Calculate the thermal efficiency and the work ratio of the ideal constant pressure cycle, when the maximum cycle temperature is 800°C.

Determine the root mean square velocity of nitrogen at a

temperature of 300 K.

Evaluate

"\\int\\int_D(3-x-y)dA"

[dA means dxdy or dydx]

where D is the triangle in the (x, y) plane bounded by the x-axis and the lines y = x

and x = 1.

Optical fibres typically use lasers as the light source. They normally transmit digital data in a series of ones and zeros. Explain how this data is used to represent a digital number between 0 and 7 and how the laser transmits this data and how it is received

1a Determine the possible number of macroscopic states for 15 molecules in two intersecting cells of equal volume.

b.detrmine the possible number of microscopic states.

c,determine the possible number of microscopic states for 8 molecules in cell A and 7 molecules in cell B.

The temperature in a refrigerator coil is 267K and that in the condenser coil is 295K. Assuming that the machine operates on the reversed Carnot cycle, calculate :

(i) C.O.P.(ref.)

(ii) The refrigerating effect per kW of input work.

(iii) The heat rejected to the condenser.

 the hot water tap of a bath delivers water at b5°c at a rate of 8kg/min. the cold water tap of the bath delivers water at 30°c at the rate of 20 kg/min. if both taps are left on for 5 minutes, calculate the final temperature of the bath water, ignoring heat losses to the surroundings

. An airplane is flying at 800 km/h at an altitude where the

pressure is 46.57 kPa and the temperature is -24.6°C. The airplane is powered

by a jet engine having a maximum cycle pressure of 280 kPa and a maximum

cycle temperature of 1090°C. The air flow is 95 kg/s. Determine the maximum

propulsive force that can be produced by the engine.