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Hanging wire has a length of 1.90m . When a steel ball of mass 51.0 kg is suspended from the wire, the wire stretches by 1.50 mm . If the ball is pulled down a small additional distance and released, at what frequency will it vibrate? Assume that the stress on the wire is less than the proportional limit.
Neutron stars consist only of neutrons and have unbelievably high densities. Find the density of such a star
A disk, with a radius of 0.25 m, is to be rotated like a merry-go-round through 1000 rad, starting from rest, gaining angular speed at the constant rate ?1 through the first 500 rad and then losing angular speed at the constant rate -?1 until it i..
A transformer is to be used to provide powerfor a computer disk drive that needs 6.4 V (rms) instead of the 120V (rms) from the wall outlet. Find the number of turns in the secondary
A fuzzy die (m = 0.2 kg) hangs from the ceiling of a car
an airboat with mass 4.36 x 102 kg including the passenger has an engine that produces a net horizontal force of 8.20
A proton moves in a circular path perpendicular to a 1.18 T magnetic field. The radius of its path is8.50 mm. Calculate the energy of theproton in eV.
Two identical coils are parallel to each other on the same axis. They are separated by a distance equal to their radius . They each have turns and carry equal currents in the same direction.
A very long, hollow cylinder (radius 4.7cm) is formed by rolling up a thin sheet of copper, Use Ampère's law to find the magnetic field outside the cylinder at a distance 6.8cm from the axis
The rms current in a copy machine is 7.50 A, and the resistance of the machine is 14.4 ?. What is the peak power delivered to the machine?
a 2.0-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. the elastic
A loop of area 0.100 m^2 is rotating at 3600 rpm (revolutions per minute) with an axis of rotation perpendicular to a 0.20 T magnetic field. what is the maximum voltage induced in the loop
A wire of resistance 7.0 isconnected to a battery whose emf is 2.0 V and whose internal resistance is 1.0. How much energy appears in the wire as thermal energy in that time
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