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A current of 1mA is passed through a slab of semiconductor material of thickness 1mm with a magnetic field of 0.1 T applied in the perpendicular direction. The Hall voltage measured at a temperature of 300 K is 625 V, whereas that measured at 500 K is 0.016 V. Estimate the band gap energy for the material.
The current in the electron beam of a computer monitor is 415 ?A. How many electrons per second hit the screen
What is the mass of sculpture (in kg) assume that the local acceleration due to gravity is 9.80 m/s2.
A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.60 s later. Find the depth of the well
A juggler throws a ball straight up with some initial velocity. Half a second later, the juggler throws another ball straight up from the same height, then what is the initial velocity of each ball
Two unequal point charges q1 and q2 are held in place unconnected from each other. A point charge Q is placed somewhere between them at a point where it remains stationary when free. From this observation, we can conclude that q1 and q2 must eithe..
The angle of incidence of a light beam in air onto a reflecting surface is continuously variable. find the index of refraction of the reflecting material
A brick hangs from a string attached to the ceiling. When a horizontal force of 15 N is applied to the brick, What is the mass of the brick
You're an optometrist, mounting a projector at the back of your 4.2m -long exam room, 2.6m above the floor. At what height should you center the pattern on the wall
When released, the textbook slides on a horizontal tabletop with coefficient of kinetic friction k = 0.30. Use the work-energy theorem to find out how far the textbook moves from its initial position before coming to rest.
A lens forms an erect image of a real object. The image is twice the size of the object and appears to be 40 cm from the lens
Two examples of chemotherapeutic drugs (drugs used to treat cancer) and their cellular actions are listed below. Describe why each drug could be fatal to a cell.
A 5kg block initially at rest is pulled to the ight along a horizontal surface by a constant, force of 30N acting at 53 degrees above the horizontal. Find the net work done on the block
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