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Oil with a viscosity of μ= 3.8 x 10-1 N s/m2 is contained between two parallel plates. The bottom plate is fixed, while the upper plate moves when a force P is applied (see the figure below). If the distance between the two plates is b = 0.3 mm, how fast will the plates eventually move if the applied force is P = 10 N? The effective area of the moving plate is A = 1,000 cm2. How does the velocity change if we double the thickness of the oil film?
An indestructible bullet 1.85 cm long is fired straight through a board that is 11.10 cm thick. The bullet strikes board with a speed of 455m/s and emerges with a speed of 279m/s. (To simplify, suppose that the bullet accelerates only while the fr..
A 2.3 kg pendulum bob is pulled out such that its center of mass is 0.26 m above its lowest point and released. What is the gravitational potential energy of the pendulum
question two insulating spheres have radii r1 and r2 masses m1 and m2 and uniformly distributed charges -q1 and q2.
Find the average magnitude of the induced emf if the change. The magnitude of the charge on a parallel plate capacitor is 4uC and the potential difference between the plates is 80V. What is the capacitance of this capacitor.
According to the shop manual, when drilling a 11.8mm--diameter hole in wood, plastic, or aluminum, a drill should have a speed of 1400 rev/min. Find the maximum radial acceleration of any part of the bit
Bob is standing 1.00m above the ground. he is holding an RPG at an angle of 30 degrees. how far from Bob will the missle land
A block (mass = 2.0 kg) is hanging from a massless cord that is wrapped around a pulley (moment of inertia = 1.1 10-3 kg · m2), Find the angular acceleration of the pulley
Let h = 25.5 m and vi = 13.6 m/s. Find the speed of the ball just before it hits the ground. vf = 26.167919 m/s Find the ball's mechanical energy at the release point. KEi + PEi = _______J Find the ball's mechanical energy just before it hits the gro..
A child slides down a snow-covered slope on a sled. At the top of the hill, her mother gives her a push at a speed of 1.5 m/s to get her started. The frictional force acting on the sled is one-fifth of the combined weight of the sled and the child.
Bill measures the rate at which the clock in Sam's spaceship runs and finds that it is one-third the rate at which the same clock runs when it is at rest
A flat bi-metallic strip consists of alluminium riveted to a strip of iron. When heated, the strip will bend. Which metal will be on the outside of the curve? Why?
A 12 V battery is connected to a plate separation of 5.00 mm and a parallel-plate capacitor with a plate area of 0.20 m2. What is the charge on the capacitor? How much energy is stored in the capacitor?
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