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Consider a 0.85 m long conductive bar hanging from a pair of conductive springs attached at each end. The bar sits in a uniform magnetic field; the field is horizontally directed and perpendicular to the bar. If the spring constant for each spring is 75.0 N/m, the magnetic field strength is 0.16 T, and the bar carries a current of 12.0 A, by how much are the springs stretched when the current is on (as compared to when the current is off)?
An AM radio station broadcasts isotropic ally (equally in all directions) with an average power of 3.20 kW. A dipole receiving antenna 65.0 cm long is at a location 4.00 miles from the transmitter. Calculate the amplitude of the emf that is induced b..
After a day of testing race cars, you decide to take your own 1478 kilogram car onto the test track. Find what average net force has you applied to the car during that time
A free particle moves about in a very expansive region where there is constant potential u. Determine the energy E. the wave functions. the expectation value of kinetic energy.
A proton moving with a velocity of 4 x 104 meter per second enters a magnetic field of 0.20 T. compute the magnitude of the force on the proton
A simple pendulum has a mass of 0.250kg and a length of 4.00 m. It is displacedthrough an angle of 11.0° and then released. Solve this problem by using the simple harmonic motion model for the motion of the pendulum.
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 point source of light is at the bottom of a koi pond, at a depth of 0.525 meters. What is the radius of the circle of light formed on the water's surface
the bureau of land management wants you to present a plan for a self-contained city. the population is 1000. your job
A plastic rod is charged to -20 nC by rubbing. How many electrons have been added or protons removed
Give the center of mass for a water molecule. The distancebetween a hydrogen atom and the oxygen atom is .91 angstroms andthe angle between the two O-H bonds is 105o
Two resistors have resistances R(smaller) and R(larger), where R(smaller)
A 5.0 kg mass experiences a force of 40 N when placed a height of 5 km. What is the value of acceleration due to gravity at this point
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