Q: An oil pump is drawing 18 kW of electric power while pumping
An oil pump is drawing 18 kW of electric power while pumping oil with Ï = 860 kg/m3 at a rate of 0.1 m3/s. The inlet and outlet diameters of the pipe are 8 cm and 12 cm, respectively. If th...
See AnswerQ: A wind tunnel draws atmospheric air at 20°C and 101
A wind tunnel draws atmospheric air at 20°C and 101.3 kPa with a large fan located near the exit of the tunnel. If the air velocity in the tunnel is 80 m/s, determine the pressure in the tu...
See AnswerQ: A pump-storage plant uses a turbine to generate hydropower during
A pump-storage plant uses a turbine to generate hydropower during the day, letting water from the upper reservoir flow through the turbine into the lower reservoir as sketched. The plant then pumps wa...
See AnswerQ: What is total energy? Identify the different forms of energy that
What is total energy? Identify the different forms of energy that constitute the total energy.
See AnswerQ: In a certain application, a siphon must go over a high
In a certain application, a siphon must go over a high wall. Can water or oil with a specific gravity of 0.8 go over a higher wall? Why?
See AnswerQ: The power generated by a wind turbine is proportional to the cube
The power generated by a wind turbine is proportional to the cube of the wind velocity. Inspired by the acceleration of a fluid in a nozzle, someone proposes to install a reducer casing to capture the...
See AnswerQ: What is the hydraulic grade line? How does it differ from
What is the hydraulic grade line? How does it differ from the energy grade line? Under what conditions do both lines coincide with the free surface of a liquid?
See AnswerQ: Express Newton’s second law of motion for rotating bodies. What can
Express Newton’s second law of motion for rotating bodies. What can you say about the angular velocity and angular momentum of a rotating nonrigid body of constant mass if the net torque acting on it...
See AnswerQ: Two firefighters are fighting a fire with identical water hoses and nozzles
Two firefighters are fighting a fire with identical water hoses and nozzles, except that one is holding the hose straight so that the water leaves the nozzle in the same direction it comes, while the...
See AnswerQ: A rocket in space (no friction or resistance to motion)
A rocket in space (no friction or resistance to motion) can expel gases relative to itself at some high velocity V. Is V the upper limit to the rocket’s ultimate velocity?
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