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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
q1. the front of her sleeper wet from teething a baby rejoices in the day by crowing and bouncing up and down in her
A golfer hits a shot to a green that is elevated 2.80 m above the point where the ball is struck. find the speed of the ball just before it lands
Draw a circuit with a 9 V battery and two resistances of 5 and 12 connected in parallel. Place an ammeter in the circuit to gauge the current in the 12 resistor, and a voltmeter to gauge the voltage across the five resistors.
Suppose a gas-filled incandescent light bulb is manufactured to have atmospheric pressure in it at 20.0°C. Find the gauge pressure inside such a bulb when it is hot
To water the yard, you use a hose with a diameter of 3.7 cm. Water flows from the hose with a speed of 1.3 m/s. If you partially block the end of the hose so the effective diameter is now 0.55 cm, with what speed does water spray from the hose?
Illustrate what are some of these benefits and illustrate what result does the organization hope to realize as a result of providing these inducements?
An extremely dense neutron with mass equal to that of the sun has a radius of about 10 km about the size of Manhattan Island. These stars are thought to rotate once about every 0.03 to 4 s, depending on their size and mass.
A ball is traveling horizontally over a volleyball net when a player "spikes" it, driving it straight down to the ground. What is the magnitude of the impulse from the spike
Find the phase change undergone by its electric vector if the refractive index of theconductor is =n(1+i)
Niagra Falls has a typical flow rate of 4 million cubic feet per minute. This water falls 165 feet. What is the average force of the water on the rock
A proton moves in a uniform 0.07 T magnetic field at 15 percent of the speed of light. determine the force acting the proton
A Major League fastball is thrown at 92.9 mph and with a spin rate of 108 rpm. how many full turns does the ball make between release and catch
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