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A thin, 1.52 m long copper rod has a mass of 52.4 g. What is the minimum current in the rod that will cause it to float in a magnetic field of 1.25 T? Answer in units of A.
At what distance from a long, straight wire carrying a current of 8.5 A is the magnetic field due to the wire equal to the strength of Earth's field, approximately 5.4 x 10-5 T? The permeabilty of free space is 1.25664 x 10-6 T x m/A. Answer in units of cm.
A man with mass 72.9 kg and density 970 kg/m^3 stands in a shallow pool with 33.3% of the volume of his body below water. Calculate the normal force the bottom of the pool
assume that the electron is a sphere of radius 10 to the power -17 meters and physically spins about an arbitrary axis.
A 1,260-kg car traveling initally with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9,600-kg truck moving in the same direction at 20.0 m/s. what is the velocity of the truck right after the collision
A vertical solid-steel post 26.0 cm in diameter and 2.53 m long is required to support a load of 8200 kg. What is the strain in the post and the change in the posts' length when the load is applied
A particle moves along the x-axis. Its position varies with time according to the expression x(t) = -6t + 5t2, where x is in meters and t is in seconds. Determine the displacement of the particle in the two time intervals t = 0 to t = 1 s and t = 1 s..
the wavelength of a 63.7-mhz electromagnetic wave is approximatelya. 1.0 mb. 7.4 cmc. 27 md. 4.7
Dirty Harry is attempting to apprehend a dangerous criminal in a cheese shop, What is the magnitude of the Gouda's velocity after being struck by the bullet
A certain superconducting magnet in the form of a solenoid of length 0.350 m can generate a magnetic field of 8.50 T in its core when its coils carry a current of 65 A. Find the number of turns in the solenoid.
A particle is at the position (x,y,z)=(1.0,2.0,3.0)m. It istraveling with a vector velocity (-5.0,+2.8,-3.1)m/s. Its mass is3.8kg. What is its vector angular momentum about the origin
IP An object is located to the left of aconvex lens whose focal length is 38 {\rm cm} .The magnification produced by the lens is m_1 = 3.3. To increase the magnification to 4.4, shouldthe object be moved closer to the lens or farther away?
a 12-in record is dropped on a large 12-in phonograph turntable that is freely turning at 37 revmin. the mass of the
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.54 hours. Determine what is density of the planet
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