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A 180-kg motor is bolted to a light horizontal beam. The unbalance of its rotor is equivalent to a 28-g mass located 150 mm from the axis of rotation, and the static deflection of the beam due to the weight of the motor is 12 mm. The amplitude of the vibration due to the unbalance can be decreased by adding a plate to the base of the motor. If the amplitude of vibration is to be less than 60 mm for motor speeds above 300 rpm, determine the required mass of the plate.
one mole of gas initially at a pressure of 4.00 atm and volume of 3.00 l has an internal energy of 89 j. in its final
The drawing shows an edge-on view of the solar panels on acommunications satellite. The dashed line specifies the normal tothe panels. Sunlight stikes the panels at an angle with respect to the normal.
Commercial ultracentrifuges can rotate at rates of 100,000 rpm. Find the distance from the rotation axis of the sample chamber in such a device
A 532 nm light wave in vacuum transmits into a glass plate of thickness 1.00 cm and index 1.60, at normal incidence. How many wavelengths span the glass
(Induction between two Coils) there is no magnetic like previous part 3.3.2 (Magnetic and Coil), but there is an induced voltage (emf) in the second coil as measured by the Oscilloscope. Where does the changing magnet flux that induces the voltag..
There are four charges, each with a magnitude of 2.06 μC. Two are positive and two are negative. Calculate the magnitude of the net electrostatic force experienced by any charge
A 1 m diameter wagon wheelconsists of a thin rim having a mass of 6 kg and six spokes, eachwith a mass of 1.5 kg. Find the moment of inertia of the wagon wheel for rotation about its axis
An electromagnetic wave produced by a dipole antenna is traveling in free space and has an rms electric field amplitude of 17 N/C. find the rms amplitude of the magnetic field
Consider a circuit containing a resistor withR = 2600 Ω and acapacitor with C = 4.9µF. At what frequency does the reactance of the capacitorequal the resistance of the resistor?
An archeological specimen containing 10.2 g of carbon has an activity of 1.6 Bq. How old (in years) is the specimen
The average speed of the space shuttle while in orbit is about 8850 m/s. How far does the space shuttle travel
Calculate the de Broglie wavelength for an alpha particle (He-e nucleus) with energy E = 4.2 GeV (which is emitted in the radioactive decay of U-238)
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