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Typical field strengths are a few femoteslas (1fT=10^-15T). An adult brain is about 140mm wide, divided into two sections (called hemispheres) each about 70mm wide. We can model the current in one hemisphere as a circular loop, 65mm in diameter, just inside the brain. The sensor is placed so that it is along the axis of the loop 2.30cm from the center. A reasonable magnetic field is 4.35fT at the sensor. According to this model, what is the current in the brain?
What is the magnetic field at the center of the hemisphere of the brain?
Which of the planets fits the following description: "a solid, cool surface, with occasional dust clouds and a thin CO2 atmosphere".
A 1.9 mol sample of hydrogen gas is heated at constant pressure from 302 K to 410 K. Calculate the energy transferred to the gas by heat.
A barge of mass 5.0 104 kg is pulled along the Erie Canal by two mules, How much work is done on the barge by both of these mules together as they pull the barge 150 m along the canal
A 42 kg pole vaulter running at 11 m/s vaults over the bar. Her speed while she is above the bar is 0.7 m/s. Avoid air resistance, as well as any energy absorbed by pole, and determine her altitude as she crosses the bar.
Consider the conical pendulum with an 80.0 kg bob on a 10.0 m wire making an angle of 5.00 with the vertical as shown. Determine (a) horizontal and vertical components of the force exerted by the wire on the pendulum and (b) radial acceleration of th..
Consider two parallel wires placed 0.0430 m apart. One wire carries a current of 6.16 A and the other wire carries a current of 7.88 A. Find the force per length
assume a charge starts at rest on an equipotential surface, is moved off that surface, and then is eventually returned to the same surface at rest after a round trip. How much work did it take to do this? Explain.
what is the acceleration of the wallet. If the contact between ball and ground lasted 1.6ms, what average force was exerted on ball.
A neutron star has a mass of 2.20 × 10^30 kg (about the mass of our sun) and a radius of 5.20 × 10^3 m. Assume an object falls from rest near the surface of such a star. How fast would it be moving after it had fallen a distance of 0.0083 m.
In the x-y plane, a charge of -4.6uC is on the x-axis at the point (-30cm,0) and a second charge of +7.2uC, Calculate the magnitude and direction of the Electric Force Fe
The minimum distance required to stop a car moving at 34 mi/h is 42 ft. What is the minimum stopping distance for the same car moving at 64.0 mi/h, assuming the same rate of acceleration.
A damped mass-spring system oscillates at 265 -Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 6.1 cm and the energy of the oscillating system is then 61.00 J.
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