• Question Tag: thermodynamics
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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 …

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• ## 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?

• 679 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 …

• 693 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 …

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• ## 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 …

• 768 views
• ## The temperature distribution at a certain input of time in concrete slab during curing is given by $$T=3x^{2}+3x+16$$ where $$x$$ is in $$cm$$ and $$T$$ is in $$K$$. Find the rate of change of temperature with time. $$(\alpha=0.003\;cm^{2}/s)$$

The temperature distribution at a certain input of time in concrete slab during curing is given by $$T=3x^{2}+3x+16$$ where $$x$$ …

• 656 views
• ## Find the upstream Mach number if there is a entropy increase across the normal shock wave of $$220\,J/\left( {kg.K} \right)$$.
Find the upstream Mach number if there is an entropy increase across the normal shock wave of $$220\,J/\left( {kg.K} \right)$$.