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Magnetic resonance imaging (MRI) is a medical technique for producing pictures of the interior of the body. The patient is placed within a strong magnetic field. One safety concern is what would happen to the positively and negatively charged particles in the body fluids if an equipment failure caused the magnetic field to be shut off suddenly. An induced emf could cause these particles to flow, producing an electric current within the body. Suppose the largest surface of the body through which flux passes has an area of 0.022 m2 and a normal that is parallel to a magnetic field of 1.0 T. Determine the smallest time period during which the field can be allowed to vanish if the magnitude of the average induced emf is to be kept less than 0.010 V.S
The magnetic flux that passes through one turn of a 10-turn coil of wire changes to 5.0 Wb from 6.0 Wb in a time of 0.086 s. The average induced current in the coil is 185A. What is the resistance of the wire?
What is the change in entropy for the system. How much force must be applied to climb the hill at the same speed and same air resistance.
A computer is reading data from a rotating CD-ROM. At a point that is 0.030m from the center of the disk, centripetal acceleration is 120m/s2. What is the centripetal acceleration at a point that is 0.05 m from the center of disc.
An infinite line of charge has linear charge density 5.50x 10-12 C/m. A proton (mass 1.67x 10-27 kg, charge +1.60 10-19 C) is 18.0 cm from line and moving directly toward the line at 1.20 x10^3 m/s. How close does the proton get to the line of char..
An aircraft with a mass of 956 kg accelerates from 0 to 92 m/s in 6.7 seconds, What is the kinetic energy of the aircraft when the aircraft launches
A friend is working on a biology experiment and needs to make an electric field of magnitude 460 {rm N/C} at a distance of 10 {rm cm} from the central portion of the large nonconducting square plate 5.2 {rm m} on each side.
A baseball player hits the ball and it lands in the field seat 10 m above the point, find the c and y components of the initial velocity vector of the baseball
A wheel of diameter 5.8 cm has a 4 m cord wrapped around its periphery. Starting from rest, wheel is given a constant angular acceleration of 4.9 rad/s2. How much time it will take for the cord to unwind.
Charge q1 = 8.5 nC is located at the coordinate system origin, while charge q2 = 3.7 nC is located at (a, 0), In Joules, what is the total potential energy U of the final configuration of three charges
In a second training exercise, the centrifuge speeds up from rest with a constant angular acceleration. When the centrifuge reaches an angular speed of 2.50 rad/s.
The third floor of a house is 10.00 m above street level. How much work is required to move a 170kg refrigerator to the third floor.
What is the direction from the players original point. he estimates that the car is about 400 m away.
An airplane has a mass of 20,000 kg and takes off under the control of a constant net force of 30,000 N. What is the net force that acts on the plane's 73 kg pilot.
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