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a block having mass m= 10kg rests on a horizontal surface. Us+.4 and Uk=.2. what is the friction force if an external horizontal force of 32N is exerted on the block?
Consider an airplane window (area 0.29 m2). If the pressure inside the plane is atmospheric pressure and the pressure outside is 22% of Patm, what is the force on the window
A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, explain how many meters will the car have moved before it begins to slow down?
Migrating geese tend to travel in straight-line paths at approximately constant speed. How far is the goose from its original position
A uniform electric field exists in the region between two oppositely charged plane parallel plates, find speed of electron when it strikes second plate
The angular velocity of a wheel is given by %uDBC0%uDF9D(t) = (2.00 rad/s2)t + (1.00 rad/s4)t3. What is the angular acceleration of the wheel as a function of time
The unit of horsepower was defined by considering the power output of a typical horse. What power does this represent in hp
A professor's office door is 0.89m wide, 2.0m high, and 4.0cm thick; has a mass of 25kg ; and pivots on frictionless hinges. When the door is open and at rest, the door closer exerts a torque of 4.5N?m
A transverse wave of frequency 14 Hz propagates down a string. Two points 15 cm apart are out of phase by pi/6. What is the wave velocity
A square loop 15 cm on a side in the xy plane. Its resistance is 0.55 ohms. determine the direction of the induced current in the loop
Electrons are accelerated through a voltage difference of 15.4 kV inside a television's cathode ray tube. What is the de Broglie wavelength of the electrons
The vector A s 3.50cm long and is directed into this page, In the right-handed coordinate system, where the +x-axis directed to the right, the +y-axis toward the top of the page
My moter has effciency of 80% with a flywheel attached to its shaft. The flywheel had a diamter of 2 ft and weighs 40 pounds. What is the input power in watts
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