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Consider electron in graphene, which is a planer monoatomic layers of carbon atoms, if the dispersion relation of electrons is taken to be E(b) = cb (where c is a constant), over the entire b-space, then the Fermi energy Ef depends on the number density of electron as?
a 1000 kg safe is held 2 m above a heavy duty spring when the rope holding it breaks. the safe compresses the spring 50
Two particles having charges of 14.5 nC and 0.580 nC are separated by a distance of 2 meter. Find at what point along the line connecting the two charges
An air spaced parallel plate capacitor has an initial charge of 0.05 uC after being connected to a 10 V battery. Calculate the work done in pulling the plates apart
q1. an electric field of 254000 nc points due west at the certain spot. what are the magnitude and direction of the
A refracting telescope has an objective and an eyepiece that have refractive powers of 1.25 diopters and 300 diopters, respectively. Find the angular magnification of the telescope
The masses of the earth and moon are 5.98 x 1024 and 7.35 x 1022 respectively. What is the magnitude of the charge placed on each body
The problem is determining the index of refraction. A microscope focuses on a tiny scratch in the upper surface of a plate of glass,then the barrel position is recorded. Next the microscope is lowered by 1.87mm and a focused image of the scratch i..
Two positive point charges, qa and qb (masses ma and mb) are at rest, half together by mass less string of length a. How fast is each one going, when they are far apart
In a hydraulic system, the piston on the left has a diameterof 5.1 cm and a mass of 1.7 kg. what is the height difference between the two pistons
The edge of the thimble of a micrometer moves a distance of 2.0 mm when it is given four complete revolutions. Find the pitch of the micrometer
A magnetic field is perpendicular to the plane of a single-turncircular coil. The magnitude of the field is changing, so that anemf of 0.82 V and a current of3.0 A are induced in the coil.
A particle moves so that its position vector is given by r=cosωt i +sinωt j where ω is constant, Explain the acceleration is directed towards the origin and its magnitude proportional to the distance from the origin
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