• Question Cagtegory: Propulsion
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• ## An apple loses 4.5 kJ of heat as at cools per degree Celsius drop in its temperature. What is the amount of heat lost from the apple per degree Fahrenheit in its temperature?

An apple loses 4.5 kJ of heat as at cools per degree Celsius drop in its temperature. What is the …

techAir Asked on 28th September 2019 in
• 4K views
• ## In a cyclic process the net heat supplied is 70 kJ/s. What is the work obtained from the cycle?

In a cyclic process the net heat supplied is 70 kJ/s. What is the work obtained from the cycle?

Worldtech Asked on 29th September 2019 in
• 926 views
• ## A paddle wheel is used for stirring a liquid contained in a tank supplied 6000 kJ of work and during the stirring operation the tank lost 1500 kJ of heat to the surroundings. If the tank and liquid are considered as a system what will be its change in internal energy.

A paddle wheel is used for stirring a liquid contained in a tank supplied 6000 kJ of work and during …

Worldtech Asked on 29th September 2019 in
• 932 views
• ## 3 kg of steam in a piston -cylinder device at 400 kPa and 175 degree Celsius undergoes a mechanically reversible , isothermal compression to a final pressure such that the steam becomes just saturated. What is the work required for the process.

3 kg of steam in a piston -cylinder device at 400 kPa and 175 degree Celsius undergoes a mechanically reversible …

techAir Asked on 29th September 2019 in
• 949 views
• ## What is the ratio of flight speed to the exhaust velocity for maximum propulsion efficiency ?

What is the ratio of flight speed to the exhaust velocity for maximum propulsion efficiency ?

Kisan Kumar Asked on 2nd October 2019 in
• 897 views
• ## Find the fuel to air ratio.

The stagnation temperatures at the inlet and exit of a combustion chamber are 600 K and 1200 K ,respectively.If the …

Kisan Kumar Asked on 8th October 2019 in
• 923 views
• ## A turbojet powered aircraft is flying at Mach number 0.8 at an altitude of10 km. What is the thrust of the engine?

A turbojet powered aircraft is flying at Mach number $$0.8$$ at an altitude of $$10\; km$$. The inlet and …

Kisan Kumar Asked on 10th October 2019 in
• 981 views
• ## Find the total temperatures at the exit of the air intake and the compressor respectively.

A jet engine is operating at a Mach number of $$0.8$$ at an altitude of $$10 \;km$$.The efficiency of the …

Kisan Kumar Asked on 10th October 2019 in
• 989 views
• ## In case of ideal triatomic gas, What is the ratio of specific heats Cp/Cv ?

In case of ideal triatomic gas, What is the ratio of specific heats $$C_p/C_v$$?

Kisan Kumar Asked on 23rd October 2019 in
• 936 views
• ## The temperature field in a body varies according to the equation $$T(x,y)=x^{3}+4xy$$. Find the direction of  fastest variation in temperature at the point $$(1,0)$$.
The temperature field in a body varies according to the equation $$T(x,y)=x^{3}+4xy$$. Find the direction of  fastest variation in temperature …