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A counter-rotating eccentric mass exciter consisting of two rotating 400-g masses describing circles of 150-mm radius at the same speed but in opposite senses is placed on a machine element to induce a steady-state vibration of the element and to determine some of the dynamic characteristics of the element. At a speed of 1200 rpm a stroboscope shows the eccentric masses to be exactly under their respective axes of rotation and the element to be passing through its position of static equilibrium. Knowing that the amplitude of the motion of the element at that speed is 15 mm and that the total mass of the system is 140 kg, determine
(a) the combined spring constant k,
(b) the damping factor c/cc
A square coil 10 cm on a side has 1200 turns and carries a current of 25 A. Calculate the amount of work required to rotate it in a magnetic field of 1.2 T from φ = 0? to φ = 180?, where φ is the angle between the magnetic dipole moment and the ma..
Light of wavelength 590nm passes throughtwo narrow slits 0.60 mm apart. The screen is 1.70 maway. What is the wavelength of the unknown light
Find what force is exerted by the water on the window of an underwater vehicle at this depth if the window is circular and has a diameter of 33.1 centimeter
steel expands 11 parts in a million for each 1 circ rm c change. consider a 40000-rm km steel pipe that forms a ring to
A nonuniform, horizontal bar of mass is supported by two massless wires against gravity. Find the position of the center of mass of the bar
after completing the calculations below sketch the ph curve for the titration of 25.0 ml of 0.200m solution of a weak
7.22 x1013 electrons flow through a transistor in 3.55 ms. What is the current (in mA) through the transistor
Compute the magnitude of the relativistic momentum of a proton with a relativistic total energy of 2.0 x 10-10 Joule
The period of a pendulum are measured to be 3.00 second in the non-moving frame of the pendulum. Find the period as measured by an observer
a 6.37-kg box is sliding across the horizontal floor of an elevator. the coefficient of kinetic friction between the
A speed ramp at an airport is basically a large conveyor belt on which you can stand and be moved along. The belt of one speed ramp moves at a constant speed such that a person who stands still on it leaves the ramp 66 s after getting on.
Determine the distance which Matthew will slide along the level surface before coming to a complete stop.
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