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A 1.6-in. deflection of the second floor of a building is measured directly under a newly installed 8200-lb piece of rotating machinery which has a slightly unbalanced rotor. Assuming that the deflection of the floor is proportional to the load it supports, determine
(a) the equivalent spring constant of the floor system,
(b) the speed in rpm of the rotating machinery that should be avoided if it is not to coincide with the natural frequency of the floor-machinery system.
A parallel plate capacitor has circular plates of diameter 12 cm. The plates are separated by 3 cm, what is the value of the electric field between the plates
A fancy lecture demo designed to gauge electric fields is shown in the figure above. A pith ball of mass 0.510 g and positive charge q = 42.6x10-6 C is suspended on a string of negligible mass in a uniform electric field. We observe that the ball han..
without moving you will suddenly see the penny magically appear. if you look into the cup at an angle of 70.0 degrees
A long straight wire has fixed negative charge with a linear chargedensity of magnitude 4.0 nC/m. The wire isto be enclosed by a coaxial, thin-walled, nonconducting cylindricalshell of radius 1.6 cm.
A 9.0 kg mess kit sliding on africtionless surface explodes into two 4.5kg parts, one moving at 6.0 m/s, duenorth, and the other at 7.5 m/s,30° north of east. What was the original speed of the mess kit?
Compute the equivalent resistance of the network in the figure. The battery has negligible internal resistance. Find the current in the 2.85Ω resistor.
A 12 kg block is moving horizontally across a frictionless surface with a constant velocity of 25 m/s, How far does the block move before it comes to a stop
A block of mass slides on a frictionless tabletop. It is connected to a string that passes over a pulley and suspends a mass (Figure 1) . Suppose that the mass on the frictionless tabletop has the value = 2.30 kg Find the value of that gives an ac..
A non-conducting charged sheet and a non-conducting sphere (radius b) are arranged as shown in the figure. The right-most surface of the sheet is at x=0 and the center of the sphere is on the x-axis at x=xnaught. The sheet has a positive uniform char..
A pinecone falls straight down from a pine tree growing on a 20 degree slope. What are the components of the pinecone's impact velocity parallel and perpendicular to the ground
A crate of mass 10.0 kg is pulled up a rough incline with aninitial speed of 1.50 m/s. The pulling force is 100.0 Nparallel to the incline, which makes a 20.0 degree angle with thehorizontal. The coefficient of kinetic friction is 0.400, and the c..
A mass spectrometer has an adjustable magnetic field. When themagnetic field is 7.000e-2 T, a singly ionizedhydrogen atom (a proton) will strike the detector at a particularlocation. Suppose a triply-ionized carbon 12 atom, whose mass is by defini..
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