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A coil that has a resistance R and an inductance L has a power factor equal to 0.866 when driven at a frequency of 44Hz. What is the coil's power factor if it is driven at 176 Hz?
A shear force of 4 x105 N is applied to an aluminum bar of length L = 28 cm, width w = 5 cm, and height h = 1.2 cm, What is the shear deformation
An expandable cylinder has its top connected to a spring with force constant 2 x10^3 N/m. The cylinder is filled with 6 L of gas with the spring relaxed at a pressure of 1.0 atm and a temperature of 20°C.
A wire that is 2.00 m long and carrying a current of 10.0 A is at right angles to a uniform magnetic field. The force acting on the wire is 0.45 N. What is the strength of the magnetic field?
Assume that a proton has a mass of 3.34 × 10-27Kg and a charge of +e. It travels in a circular path with a radius 6.96mm in a magnetic field with magnitude 2.50T. Find the time required for it to make half a revolution
A 5 kg block is dragged on a horizontal surface in a circular path of radius 2 m. what is the work done by friction during one turn
Two different simple harmonic oscillators have the same natural frequency (f=2.60 Hz) when they are on the surface of the Earth. what is the new frequency of the pendulum
A certain species of ionized atoms produces an emission line spectrum according to the Bohr model, Find the next-to-the-longest wavelength in the series of lines
a particle with a mass of 3 mg and a charge of q is moving at a speed of 1300 ms along a horizontal path 14 cm below
An aluminum cylinder with radius 2.3cm and length 19cm is heated to 430 degrees C. Find the net power this cylinder radiates into a room
The electromagnet produces a field that is uniform throughout the volume between the faces. Describe the electric field that results in the region between the poles
A planet of total mass M and radius R has a non-uniform density such that p(r) = po (1-r/R), Determine the gravitational field g(r) at a point r ? R inside the planet
The distance between the eyepiece and the objective lens in a certain compound microscope is 21.5 cm. What is the overall magnification of the microscope
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