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a motor starts from rest with an angular acceleration of 12. rad/s ^2 what is the motor angular speed 4.0s later? how many revolutions does it make in this period of time.
define the potential difference between the plates.With what force must the player push the puck so that his force just equals the frictional force.
Two tiny conducting spheres with a mass of 15gm each are hanging from non-conducting threads of length 70cm such that they are 4cm apart as shown to the left.
A playground merry-go-round of radius R = 2 m has a moment of inertia I = 275 kg•m2 and is rotating at 14 rev/min about a frictionless vertical axle.
What is the lift (in newtons) by reason of Bernoulli's principle on a wing of area 77 m^2 if the air passes over the top and bottom surfaces at speeds of 270 m/s and 140 m/s, correspondingly.
A dolphin wants to swim directly back to its home bay, which is 0.760 km due west. It can swim at a speed of 4.23 m/s relative to the water, but a uniform water current flows with speed 2.92 m/s in the southeast direction. What direction should th..
A projectile is fired at an angle of 55 degrees above the horizontal with an inital speed of 35.0 m/s. What is the magnitude of the horizontal component of the bullet's
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 190 mi/h in 2.00 s. (a) Find the average acceleration of the plane. Your response is within 10% of the correct value. This may be due to round..
Calculate P necessary to just start opening the 2 m wide gate.
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 460 lines/mm , and the light is observed on a screen 1.7 m b..
A door of width 1.0 and height 2.0 weighs 279 and is supported by two hinges, one a distance 0.500 from the top and the other a distance 0.50 from the bottom. Each hinge supports half the total weight of the door.
A rectangular coil of wire with an area of 0.218 m2 is situated in a constant magnetic field whose magnitude is 0.450 T, What is the flux through the surface
At one instant a bicyclist is 53m due east of a park's flagpole, going due south with a speed of 12m/s. Then 37s later, the cyclist is 53m due north of the flagpole, going due east with a speed of 12m/s. For the cyclist in this 37s interval.
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