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Sketch how you would arrange four 3-in.-wide by 12-in.-long thin but rigid strips of sheet metal on a hub to create a windmill like the one shown in Video V12.1. Discuss, with the help of velocity triangles, how you would arrange each blade on the hub and how you would orient your windmill in the wind.
A power plant operates at 28.5% efficiency during the summer when the seawater used for cooling is at 20.0°C. what would be the plant's efficiency in the winter
the conductivity of tungsten at room temperature s 1.8 107 am2vm is significantly smaller than that of copper. at the
A motorist suddenly notices a stalled car and slams on the brakes, negatively accelerating at 6.4 . Unfortunately this isn't enough, and a collision ensues. From the damage sustained, police estimate that the car was going 18 at the time of the co..
A 0.75 kilogram ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.5 meter on a frictionless horizontal surface. find what is the maximum speed the ball can have
An electron with a speed of 1.1 × 107 m/s moves horizontally into a region where a constant vertical force of 5.6 × 10-16 N acts on it. determine the vertical distance the electron is deflected
An artificial lens is implanted in a person's eye to replace a diseased lens. The distance between the artificial lens and the retina is2.82cm. What is the power of the implanted lens
0.015mol of a diatomic gas, with initial temperature 18 degrees C , How much heat is added during this process
A 1000 kg roller coaster car starts from rest from a hilltop 80.0 m above the ground, find the average frictional force between the car's wheels and the track
Air, like all fluids, exerts a buoyant force on objects. THusan object's apparent weight in air is slightly less than its weightin a vacuum. What are the approximate dimensions of this shpae
How a magnetic field around a ring behaves at various locations - observe the distribution of the magnetic field around a ring with a uniform charge and a conventional current.
a model rocket is fired vertically from rest. It has a net acceleration of 17.5 m/s2. how long after liftoff does the rocket return to the ground
an electric field is constant at every point on a square surface that is 0.80 m on a side. this field has a magnitude
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