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A thin steel beam 8.0 m long is suspended from a crane and is undergoing tensional oscillations. Two75 kg steelworkers leap onto opposite ends of the beam, as shown in Fig. 13.29. If the frequency of torsionaloscillations diminishes by 30%, what is the mass of the beam?
A 2.1 kg block of wood rests on a long tabletop. A 11.8 g bullet moving horizontally with a speed of 156 m/s is shot into the block and sticks in it
A 7450kg iceberg with density 931 kg/m3 is afloat in seawater with density 1030 kg/m3. Find the volume of water displaced by the iceberg
A box with a mass of 8 kg is lifted (without acceleration) through a height of 9 m, in order to place it upon the shelf of the closet.
A positively charged oil drop of mass is injected into a region of uniform electric field between two oppositely charged, what is the magnitude of the charge on the drop
An antifreeze solution is made by mixing ethylene glycol (? = 1116 kg/m3) with water. determine the volume percentage of ethylene glycol in the solution
A long current-carrying wire is parallel to the y axis with the current I = 4.3 A along the +y direction. A magnetic field of magnitude B = 1.1 T lies in the y—z plane, directed 35° away from the y axis as shown in the figure below
As a baseball is being thrown, it goes from 0.0 to 40.0 ms in 0.34 s, What is the acceleration of the baseball
A commuter train blows its horn as it passes a passenger platformat a constant speed of 30.0 m/s. The trainhorn sounds at a frequency of 330 Hz whenthe train is at rest. What wavelength does the observer find in each case?
A vector {vec A} has a magnitude of 40.0 {rm m} and points in a direction 20.0 ^circ below the positive x axis. A second vector, {vec B}, has the magnitude of 75.0 {rm m} and points in a direction 50.0 ^circ above the positive x axis.
a long wire lying along the x-axis carries a current of 2.80a in the x direction. there is a uniform magnetic field
A thin double convex glass lens with an index of 1.56 while surrounded by air has a 10 cm focal length. what is the focal length of the lens in water
suppose that you need to get a heavy couch into the bed of a pickup truck. part a figure you know the bed of the truck
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