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The Hall effect can be used to determine the density of mobile electrons in a conductor. A thin strip of the material being investigated is immersed in a magnetic field and oriented so that its surface is perpendicular to the field. In a particular measurement, the magnetic field strength was 0.607 T, the strip was 0.102 mm thick, the current along the strip was 2.93 A, and the Hall voltage between the strip\'s edges was 2.61 mV. Find the density of mobile electrons in the material.
A copper wire has a 25 m-ohmic resistance at 20 degrees C. When the wire is carrying a current, What is the change in the wire's resistance
Emilie's potter's wheel rotates with a constant 2.20rad/s2 angular acceleration. What was the angular velocity of the wheel at the beginning of the 3.30s interval
IP An rms voltage of 12.5V with a frequency of 1.10kHz is applied to a 0.375?F capacitor. Calculate the current for a frequency of 2.20kHz
The following takes place with inelastic collision. Ball 1 travels up with a mass of 3 Kg and a velocity of 20 m/s. How high do the balls travel after the collision
A light plane is headed due south with a speed of 190km/h relative to still air. After 1.00 hour, the pilot notices that they have covered only 137km, What is the wind velocity (magnitude)
A house is 30 ft long and 24 ft wide, and has 8 ft high ceilings. What is the volume of the interior of the house in cubic meters and cubic centimetres.
The drawing shows an equilateral triangle, each side of which has a length of 1.59 cm. Point charges are fixed to each corner, Determine the charge qA and q
A bucket of mass 1.60 is whirled in a vertical circle of radius 1.45. Find the speed of the bucket
When placed 1.2 m apart, the force each exerts on the other is 12 N and is repulsive. What is the charge on each? What if the force were attractive.
A missile is fired from a launcher with an initial velocity of 250 m/s at a target located 500 m above the launcher, determine The possible firing angles required to hit the target
two plates of radius R are separated by a distance 2h.the top plate rotates with velocity w. find the velocity as a function of radius r and and height z
An electron acquires 5.95×10?16J of kinetic energy when it is accelerated by an electric field from plate A to plate B
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