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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 ball of mass 2.10kg and radius 0.140m is released from rest on a plane inclined at an angle θ=40.0 degrees with respect to the horizontal. How fast is the ball moving (in m/s) after it has rolled a distance d=1.80m?
A charged particle with a charge-to-mass ratio of |q|/m = 5.7x 108 C/kg travels on a circular path that isperpendicular to a magnetic field whose magnitude is 0.76 T. How much time does it take for the particle to complete onerevolution? t = ?
when the car you are riding in stops suddenly heavy objects move toward the front of the car. why does a helium-filled
A water tank springs a leak. Find the speed of water emerging from the hole if the leak is 3.0m below the surface of the water, which is open to the atmosphere
the drawing shows an edge-on view of two planar surfaces that intersect and are mutually perpendicular. surface 1 has
One member of a pair of parallel conducting plates has potential 17 V. An electron is ejected from that plate at potential, What is the potential of the second plate
Electrons are accelerated through a voltage difference of 240 kV inside a high voltage accelerator tube. What is the final kinetic energy of the electrons
In a control system, an accelerometer consists of a 4.99-g object sliding on a calibrated horizontal rail, Find the force constant of the spring required for the calibration to be correct
You accidentally drop your cell phone, releasing it with an initial velocity of 0 m/s. If it takes 5 seconds to hit the floor, evaluate what is its velocity when it hits the floor
Four answers required for this problem. A converging lens has a focal length on both sides of 24.0 cm. Is the image to the left or right of the lens
Four charged particles rest at the corners of a square of side a = 0.30 m. Charges 1 through 4 are 10, 20, 30 and 40 µC, Determine the electric field at the center of the square
What is the minimum speed the proton needs to totally escape from these particles
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