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A 120-V motor has mechanical power output of 3.00 hp. It is 83.0% efficient in convertingpower 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 electrical transmission in 2.00 h of operation.c) If the electric company charges $0.160/kWh, what does itcost to run the motor for 2.00h ?
A transparent oil with index of refraction 1.19 spills on the surface of water (index of refraction 1.33), producing a maximum of reflection with normally incident green light (wavelength 500 nm in air). Assuming the maximum occurs in the first order..
A long jumper leaves the ground at an angle of 20.0o to the horizontal and at a speed of 11.0 m/s. What is the takeoff speed of the jumper
A concial tank (inverted right circular cone) filled withwater is 10ft across the top and 12ft high. How much work is needed to pump all the water out over the top
How does the mass and electric charge of a proton compare with the mass and charge of an electron?
In an amusement park "Rocket" ride, cars are suspended from 4.25 m long cables attached to rotating arms at a distance of 6.00 m from the axis of rotation. What would the angular speed be if the angle of the "Rocket" cars were changed to 60o from v..
Calculate the minimum required initial velocity for a home run, for baseballs hit at the angles 10 degree, 20 degree, 30 degrees, and 40 degrees from the horizontal
The light shining on a diffraction grating has a wavelength of 463 nm (in vacuum). How many lines per centimeter does the grating have
four identical 2kg point masses are fixed at the corners of a massless rectangle of length 20cm and width 15cm. determine the angular velocity of the masses
Spherical mirror has a focal length of 10 cm. find location and then describe image for an object distance of 25 cm. How fast does the image of the object move
A stone with a mass of 0.900 kg is attached to one end of a string 0.900 m long. The string would break if its tension exceeds 60-N. The stone is whirled in a horizontal circle on a frictionless tabletop.
A 38 ohm resistor is made from a coil of copper wire whose total mass is 11.2 g. Find out the length and diameter of the wire.
For a particle on in a box running between x=0 and x=1 the function cos[n π x] is not a satisfactory solution. The function cos[n π x/2] is a satisfactory solution for a particle in a box running between -1 and 1. Explain
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