A hydroelectric generator converts kinetic energy of water into electrical energy. Each second 1755 m of water passes over a waterfall 107 m high and the generator is only 66 % efficient: (The mass of 1 mo of water is 1000 kg.)

A hydroelectric generator converts kinetic energy of water into electrical energy. Each second 1755 m of water passes over a waterfall 107 m high and the generator is only 66 % efficient: (The mass of 1 mo of water is 1000 kg.)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A jet of freshwater strikes a series of vanes of a turbine at 25° with the direction of motion and leaves it at 150° absolute with the direction of motion. The absolute inlet velocity of the jet is 25 m/s and the vanes move at a velocity of 10 m/s. Ignore friction across the vanes. Calculate:
A pump is used to raise the pressure of water from 0 psig to 55 psia. How much power (in kW) will be required to pump 1.5ft3/s of water? What is the effect of the water temperature on the pump power that is required? a. Sketch the problem. b.Draw lines identifying the control volume, or control mass. c.Identify the states with numbers, letters, or descriptions such as “in” and “out”. d.Write down the knowns and unknowns. e.Identify what is being asked for. f.State all assumptions.
A 75 kg diver climbs up a 6.5 m high diving board in 50 s, how much work is done by the diver and what is his power? (take g = 9.80 m/s2)
An electric motor drives a compressor by use of V-belt. The pulley diameter of the compressor shaft is 1.1 meter while the pulley diameter of the motor shaft is 0.6 meter. The belt speed runs at 27 m/s. The center distance between pulleys is 1.75 m. The groove angle of the pulleys is 35º. Determine the power generated in kW if the tension at the tight side of the belt is 670.5 N. The coefficient of friction between the belt and the pulley is 0.23.
Standalone problem with no figure. A motor lifts a 500 kg mass a distance of 20 m in 30 seconds. The motor has an efficiency of 70%. What is the average power used by the motor? Neglect any changes in kinetic energy as insignificant. 476 W 48.5 W 233 W 2290 W 4670 W
Water flow through a pipe at 18 li/sec. The inlet diameter of pipe is 15 cm and its exit diameter is 10 cm. If water is to be pumped from water source 8.2 m and heat loses is 2.1 kw, determine the power input to the pump.
3.)A pump delivers 4 m³/min of water from 110 kPa to 350 kPa. Both pipe's gages are on the same level. The inlet and outlet pipe diameters are 16 cm and 13 cm, respectively. The inlet and outlet are both 25°C and mass density of water is 997 kg/m³. Calculate the pump work in kW.
A box has a mass of 8.3 kg. The box is lifted from the garage floor and placed on a shelf. If the box gains 282 J of Potential Energy, how high is the shelf in meters?
A gasoline engine is 30% efficient, which means it can transfer 30% of the energy heat provides the engine with useful success. If the engine consumes 0.8 L/h of gasoline with consumption index 3.5·104 kJ/L, find the amount of work done in kW and horsepower (hp)
In unloading a grain from a hold of a ship, an elevator lifts the grain through a distance of 12 m. Grain is discharged at the top of the elevator at a rate of 2.0 kg each second, and the discharged speed of each grain particle is 3 m/s Find the minimum-horsepower motor that can elevate the grain in this way if it is 60% efficient.
30. A1 000-kg roller coaster car is initially at the top of a rise, at point . It then moves 155 ft, at an angle of 40.0 below the horizontal, to a lower point . (a) Choose the car at point to be the zero configuration for gravitational potential energy of the roller coaster-Earth system. Find the poten- tial energy of the system when the car is at points @ and O, and the change in potential energy as the car moves between these points. (b) Repeat part (a), setting the zero configuration with the car at point @.
In a movie, a 1200 kg car falls a vertical distance of 24 m starting from rest. What is the work done by the gravitational force on the car? Use the work and kinetic energy theorem to find the speed of the car just before hitting the water? Genty doen work on car