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A variable-speed motor is rigidly attached to a beam BC. When the speed of the motor is less than 600 rpm or more than 1200 rpm, a small object placed at A is observed to remain in contact with the beam. For speeds between 600 and 1200 rpm the object is observed to "dance" and actually to lose contact with the beam. Determine the speed at which resonance will occur
An external force F, with a magnitude of 16.49 N, acts on a block of mass 1.40 kg parallel to a plane, Calculate the magnitude of the frictional force acting on the body
Give the basic physics reason of at least three errors in each of the two bond diagrams of shallow acceptor and donor in semiconductors shown below.
A person undergoing radiation treatment for a cancerous growth receives an absorbed dose of 1.8 Gy. All the radiation is absorbed by the gowth. Determine the rise in temperature
an airplane is traveling at 117 mph relative to the air 13 degrees e of n at an altitude of 5000 ft. it encounters a
a 2190 kg car moving east at 10.4 ms collides with a 3170 kg car moving east. the cars stick together and move east as
Two small non conducting spheres have a total positive charge of 108.4 μC. Obtain what is the charge on the spheres
question a 75kg student is standing atop a spring in an elevator that is accelerating upward at 3.0ms2 the spring
A 100 kg sled is slid across a smooth ice field by a group of four dogs tied to the sled pulling with a 350 N force along a rope at an angle of 20 degrees above the horizontal. (a) If the sled travels at a constant speed, find the drag force on the s..
After a 0.813 nm x-ray photon scatters from a free electron, the electron recoils with a speed equal to 1.46E+6 m/s. Through what angle was the photon scattered
An irrigation system lies in a horizontal plane, with a large diameter pipe delivering water through a single line to three branches. The delivery pipe has an internal pressure p0 ¼ 200 kPa and is sufficiently large that internal kinetic energy te..
Two capacitors of capacitance 5.0 μF and 8.0 μF areconnected in series. The 3rd capacitor of 10 μF isconnected in parallel with the 1st capacitor 5.0 μFcapacitor. The network is connected to a battery of 9.0V.
A bird stands on a dc electric transmission line carrying 2540 A, What is the potential difference between the bird's feet
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