Questions from Thermal Fluid Science


Q: Steam is accelerated as it flows through an actual adiabatic nozzle.

Steam is accelerated as it flows through an actual adiabatic nozzle. The entropy of the steam at the nozzle exit will be (greater than, equal to, less than) the entropy at the nozzle inlet.

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Q: A rigid tank contains 7.5 kg of saturated water mixture

A rigid tank contains 7.5 kg of saturated water mixture at 400 kPa. A valve at the bottom of the tank is now opened, and liquid is withdrawn from the tank. Heat is transferred to the steam such that t...

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Q: A proposed heat pump design creates a heating effect of 25 kW

A proposed heat pump design creates a heating effect of 25 kW while using 5 kW of electrical power. The thermal energy reservoirs are at 300 K and 260 K. Is this possible according to the increase of...

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Q: A refrigerator with a coefficient of performance of 4 transfers heat from

A refrigerator with a coefficient of performance of 4 transfers heat from a cold region at –20°C to a hot region at 30°C. Calculate the total entropy change of...

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Q: What is the minimum internal energy that steam can achieve as it

What is the minimum internal energy that steam can achieve as it is expanded adiabatically in a closed system from 1500 kPa and 320°C to 100 kPa?

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Q: Is it possible to expand water at 30 psia and 70 percent

Is it possible to expand water at 30 psia and 70 percent quality to 10 psia in a closed system undergoing an isothermal, reversible process while exchanging heat with an energy reservoir at 300°F?

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Q: What is the maximum volume that 3 kg of oxygen at 950

What is the maximum volume that 3 kg of oxygen at 950 kPa and 373°C can be adiabatically expanded to in a piston–cylinder device if the final pressure is to be 100 kPa?

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Q: Define stress, normal stress, shear stress, and pressure.

Define stress, normal stress, shear stress, and pressure.

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Q: A water pipe is connected to a double-U manometer as

A water pipe is connected to a double-U manometer as shown in Fig. P2–80E at a location where the local atmospheric pressure is 14.2 psia. Determine the absolute pressure at the cent...

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Q: A 100-lbm block of a solid material whose specific heat

A 100-lbm block of a solid material whose specific heat is 0.5 Btu/lbm·R is at 80°F. It is heated with 10 lbm of saturated water vapor that has a constant pressure of 20 psia. Determine the final temp...

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