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A 120-V motor has mechanical power output of 2.10 hp. It is 80.0% efficient in converting power that it takes in by electrical transmission into mechanical power.
a) Find the current in the motor.b) Find the energy delivered to the motor by electricaltransmission in 2.50 h of operation.c) If the electric company charges $0.160/kWh, what does it costto run the motor for 2.50 h?
A 170 ball is dropped from a height of 1.8 , bounces on a hard floor, and rebounds to a height of 1.0. What maximum force does the floor exert on the ball
If this radiation is directed at a crystal, the first-order maximum in the reflected radiation occurs when the angle of incidence is 2.05o. What is the spacing between reflecting planes in the crystal
If the area of the crack is 1.3 cm^3, at what rate of flow does the water leave the container
question1you encounters a moving walkway that is 91 long and has the speed of 2.1 relative to the ground. how long
A wheel is mounted on a stationary axle, which is nearly frictionless so that the wheel turns freely. The wheel has an inner ring with mass 5 kg, how much work do you do
a conducting sheet carries a surface current density of k amperesmeter. there are no other currents in the vicinity.a-
The person weighs 170 lb. Each crutch makes an angle of 22.0with the vertical. determine the magnitude of the compression force supported by each crutch
What is the Compton effect, What is the shift in the wavelength of x-rays upon Compton scattering
a horizontal meter stick has a mass of 213 g. three weights ride on the meter stick 263 g at 41.5 cm 181 g at 77.3 cm
A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred? The elementary charge is 1.60218 × 10?19 C
A constant force, F = (4.63, ?3.79, 1.96) N,acts on an object of mass 18.9 kg, What is the total work done by this force
A copper pot sits on a hot plate that is at a remperature of 140 C, How long before one half the pots contents evaporate
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