Reference no: EM13962392
1. Imagine a small cylindrical permanent magnet floating above a superconducting tin disk bathed in liquid helium at around 1.2 K. The magnet was placed on the disk, and the latter was cooled below its transition temperature, at which point the magnet spontaneously jumped into the air. Explain what happened. This same kind of magnet levitation is being applied via high-temperature superconductors to produce frictionless magnetic bearings for gyroscopes, computer disk drives and the like.
2. A coaxial cable (like those used in cable TV installatins and with VCR's) consist of central conducting wire imbedded in a cylindrical insulating core which is then surrounded by another outer conducting cylinder usually made of wrapped aluminum foil or copper braid. Suppose such a cable carries a current of 2.00 A flowing in the opposite direction along the wire and 2.00 A flowing in the opposite direction along the foil. Use Ampere's Law to find the magnitude of the magnetic field at at radial distance
r = 1.5 mm tht is between conductor's?
3. Use Ampere's Law to find the magnitude of the magnetic field outside the coaxial cable in the previous problem.
4. A proton travels downward in the vertical x-z plane at an angle -40 deg with respect to the x-axis. It passes through a uniform horizontal B-field directed in the +y-direction. In what direction is the resulting magnetic force?
5. A negatively charged particle traveling in the positive y-direction enters a region of space pervaded by a 1.0-T uniform magnetic field directed in the negative y-direction. Determine the direction of the magnetic force acting on the particle.
6. Determine the magnetic force acting on a tiny sphere carrying a charge of 2.00nC and traveling at a speed of 500 m/s perpendicular to a 2.00-T B-field.
7. A proton moving at 3.00X 10^6 m/s through a uniform magnetic field experience a maximum force of
5.2 x 10^-12 N, straight upward when it's traveling due east. Determine B.
8. Consider a tiny 1.00 x 10^-6 kg sphere carrying a charge of 2.5 nC. The sphere is moving at 3.00 x 10^6 m/s in the positive x-direction. Given that it enters a region occupied by a uniform 0.300-T field making an angle of 30.0 deg to the x-axis, determine the magnitude of the spere's acceleration.
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How many degrees below the positive y axis
: A straight current-carrying (108 amps) wire makes an angle of 30 deg. with a .269T uniform magnetic field. What is the magnitude of the force exerted on an 525 cm length of the wire?
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Describe your idea of a best practice
: List three processes in your organization that are considered "best practices" and describe how they meet the critical questions. If your organization does not have a best practice, use the knowledge gained from the case studies and article review..
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What is smallest value of u that will maintain this position
: A cylinder of mass M and radius R rests on an inclined plane. It is held in place by a horizontal string that is attached to the edge of the cylinder. If the angle that the plane makes with the horizontal is theta, and the coefficient of static fr..
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Saving the manatees
: "So how am I going to spend this money" thought Tom Wieboldt as he sat starting at the pictures and posters of manatees around his office. An avid environmentalist, Tom is the president of "Friends of the Manatees" - a nonprofit organization tryin..
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Determine the magnitude of the spere''s acceleration.
: A proton travels downward in the vertical x-z plane at an angle -40 deg with respect to the x-axis. It passes through a uniform horizontal B-field directed in the +y-direction. In what direction is the resulting magnetic force?
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Prepare a pie chart showing the dollars
: An initial budget for your plan - prepare a pie chart showing the dollars/percentages budgeted for each included marketing activity for the first year, and provide justification for your choices
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Find x coordinate and the velocity of movable end of spring
: Assume an x axis origin at the movable end of the spring when the spring contains no potential energy. At some instant, with the system stationary, the cord is cut and mass M begins simple harmonic motion. Find the x coordinate and the velocity of ..
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Why is coax cable used in some applications
: find the magnetic field in the space between the wire and the sleeve; and also in the space outside the sleeve. (that is , find the mag field at a distance 'r' from the center of the wire when b c )
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Describe the changes you would like to see and why
: On a PowerPoint Presentation show a picture of the product that you would like to see revamped. Describe the changes you would like to see and why
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