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An electric motor raises the container of a liquid a vertical distance of 7.5 m in only 6.0 s. During this time its power input is 9.5 kW.
a) How much work does the motor do on the liquid?
b) How much power does the motor generate while it is raising the liquid?
c) What is the percentage efficiency of the motor?
Do your calculated values of R1 and R2 compare favorably with the stated values of the resistor? How do you account for the difference?
A 2.00-nF capacitor with an initial charge of 5.06 µC is discharged through a 1.28-k? resistor. What is the maximum current in the resistor
Three equal positive point charges of magnitude Q = 12.00%u03BC C are located at three corners of a square of edge length d = 11.1 cm. What is the magnitude of the attractive force on the negative charge
A rescue helicopter lifts a 79 kilogram person straight up by means of cable. Use the work-energy theorem and calculate the final speed of the man
1. How is a radioactive material different from a material that is not radioactive? What is radioactive decay?
A 22.0 F capacitor is charged by a 155.0 V power supply, then disconnected from the power and connected in series with a 0.220-mH inductor. Calculate the oscillation frequency of the circuit
the driver of a car slams on her brakes to avoid collidingwith a deer crossing the highway. what happens to the car's kineticenergy as it comes to rest
A solid sphere (M=2.0 kg and R=0.5 m) is rolling without slipping on a horizontal surface at speed vcm=4.3 m/s, How high will it go on the incline before it rolls down
Calculate the longest wavelengths for light in the Balmer, Lyman, and Brackett series for hydrogen
A golf ball, hit from the tee, travel 325 m in a direction 25 degrees south of the east axis. What are the east and north components of its displacement?
Solenoids produce magnetic fields that are relativelyintense for the amount of current they carry. Calculate the magnetic field at the center of the solenoid
Light of 650 nm is incident on two slits. A maximum is seen at an angle of 5.74° and a minimum of 6.46°. What is the order m of the maximum
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