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A uniform board is leaning against a smooth vertical wall. Theboard is at an angle above the horizontal ground. Thecoefficient of static friction between the ground and the lower endof the board is 0.550. Find the smallest value for the angle, such that the lower end of the boarddoes not slide along the ground.
What is the magnitude of the runner's total displacement . What is the phase difference between the two waves next they reach the observer.
A beam of particles is directed at a 0.014-kg tumor. There are 1.9 Ã- 1010 particles per second reaching the tumor, Find the biologically equivalent dose given to the tumor in 22 s
A Carnot engine does work of 150 J per cycle. The engine operates between two reservoirs at 20 degree C and 500 degree C. How much energy is lost per cycle in its exhaust
A commercial airliner is undergoing its initial ascent while the pilot maintains a cabin environment of T = 23C, r = 0.35, and p = 880 hPa. At the 670 hPa level an exit door ruptures and the cabin pressure rapidly decompresses (glad i'm not in this p..
An electron moves in a force field due to a uniform electric fied E=E(i+j) and a uniform magnetic field B=Bk. Take the initial position of the electron at the origin with initial speed Vo=Vox i in the x direction
A ball with 3gr mass and momentum P strikes elastically a wall and bounces off. Calculate the change in the ball's momentum
A 5.00g bullet is fired horizontally into a 1.20kg wooden block resting on a horizontal surface. What was the initial speed of the bullet
A +4.5-µC charge experiences a 0.59 N force in the positive y direction. If this charge is replaced with a -1.0 µC charge, what force will it experience
Two equally charged insulating balls each weigh 0.26 g and hang from a common point by identical threads 25 cm long. find the magnitude of the charge on each ball
A pendulum of length L = 8.40 m with a bob of mass m = 18.0 kg is pulled aside until the bob is a distance L = 6.72 m above its equilibrium position
A space probe is traveling in outer space with a momentum that has a magnitude of 4.94 x 107 kg·m/s. Determine the momentum of the probe after the retrorocket ceases to fire
A barber's chair with a person in it weighs 2100N. The output plunger of a hydraulic system begins to lift the chair when the barber's foot applies a force of 55N to the input piston.
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