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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.
Visible light (wavelength 400 - 700 nm) passes through a diffraction grating with 5000 lines/cm and illuminates a wall 5.0 m away. How wide (linear distance) is this order spectrum on the wall
All during the motionthe particle moves perpendicular to the magnetic field. What is the magnitude of the magnetic force acting on the particle? I tried F=qBvcos of theta but I'm not sure that's the answer. Please help.
Light enters the aperture of your AN/PVS-15 Night Vision Goggles at an incident angle of 32 degrees, What is the index of refraction of your objective lens
The potential energy stored in the compressed spring of a dart gun, with a spring constant of 60.00 N/m, is 1.260 J. Determine by how much is the spring is compressed
consider an electron in an infinitely deep one-dimensional potential well of width lz 1 nm . thisnbspelectron is
q1. physics instructor wants to produce a double-slit interference pattern large enough for her class to see. for the
A wedge of mass m = 38.1 kg is located on a plane that is inclined by an angle θ = 22.1 with respect to the horizontal. What is the acceleration of the wedge along the plane
A projectile is fired straight up at a speed of 15 m/s. The acceleration of gravity is 9.8m/s2. Find how long does it take to reach the top of its motion
q1. a worker stands still on a roof sloped at an angle of 40deg above the horizontal. he is prevented from slipping by
A 12.0-g bullet is fired horizontally into a 100-g wooden block that is initially at rest on a frictionless horizontal surface, what was the speed of the bullet at impact with the block
A ladder of mass 30 kg and length 5m leans against a frictionless wall. The angle between the ladder and the wall is 37 degree. what is the force between the ladder and the wall
A muonic atom is an atom containing a muon (like an electron, but 206.46(30) times the electron mass. Calculate the energy of an n=2 to n=1 transitions in a lead (z=82) muonic atom.
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