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Magnetic resonance imaging (MRI) is a medical technique for producing pictures of the interior of the body. The patient is located 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. Assume 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 1.5 T. Find 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
How far from a -6.20 microcoulombs point charge must a 2.30 microcoulombs, Calculate the distance in meters
welding machine draws a 18A of current at 240V. When it is inadvertently connected to a 120V outlet, the current in it is 10A. Is the machine's resistance ohmic
Draw a motion diagram for the train. Assume that the train is moving toward the right and starts to slow down at t = 0. The separation of each dot represents an elapsed time of one second.
A fully charged capacitor with a voltage of 270 kV is discharged through a resistor. What is the voltage across the capacitor atthe end of four time constants?
A spring-mass system has a natural frequency given by w=sqrt(k/m) km, Determine natural frequency, w in units of rad/sec and Hz
“A standard bowling ball weighs 18 pounds. You wish to hold a bowling ball in front of you, with the elbow bent at a right angle. Suppose that your biceps attaches to your forearm at 2.5 cm out from the elbow joint, and that your biceps muscle pulls ..
A man claims that he can hold onto a 16.0-kg child in a head-on collision as long as he has his seat belt on. Find the magnitude of the average force needed to hold onto the child
A potter's wheel a thick stone disk of radius 0.500 meter and mass 125 kilogram is freely rotating at 50.0 rev/min. Determine the effective coefficient of kinetic friction between the rag and the wheel
a 2.0 kg ball and a 3.5kg ball are connected by a 2.5m long rigid massless rod. the rod and balls are rotating
question1a small object with a mass of 420 mg carries a charge of 40.0 nc and is pending by a thread between the
A rescue helicopter lifts a 84.2-kg person straight up by means of a cable. The person has an upward acceleration of 0.759 m/s2, What is the tension in the cable
A satellite with a mass of 310 kg moves in a circular orbit 3.00 multiply.gif 107 m above the Earth's surface. What is the gravitational force on the satellite
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