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Q1. The wire is made up of atoms with valence 2 and molecular mass 80 g/mole, where u = 1.5605 × 10-27 kg is the mass of a hydro- gen atom. Assume there is one conduction electron per atom.
What is the drift speed of the electrons when there is the voltage drop of 94.5 V across wire?
Q2. Two charges, and are the distance apart. These two charges are free to move but do not because there is a third charge nearby what should be the magnitude of the third charge and its placement in sequence for the first two to be in equilibrium?
Two identical small insulating balls are suspended by separate 0.208m threads that are attached to a common point on the ceiling. Determine the charge on each ball
The measured conductivity of Cu at Room Temperature is 5.88 x 107/ohm.m and the Fermi energy for Cu is 7.03 eV, Find the mean free path( mfp) of electrons in copper
Two point charges lie on the x axis. A charge of 6.2uC is at the origin, and a charge of -9.4uC is at x=10.0cm. What is the net electric field at x=+4.0cm
A tiny sphere with a charge of q = +6.0 µC is attached to a spring. Two other tiny charged spheres, each with a charge of ?4.0-µC, are placed in the positions, in which b = 3.8 cm. The spring stretches 5.0 cm from its previous equilibrium position..
Does current through a power supply increase when parallel bulbs are added? what is the current through the power source
A virtual image is formed 22.0cm from a concave mirror having a radius of curvature of 44.0cm. find the position of the object
A baking dish is removed from a hot oven and placed on a cooling rack. As the dish cools down to 30.0°C from 196°C, What was the net radiant power of the baking dish
A person with nearsightedness was prescribed with contact lenses of power -2.0 D. What is the range of object distances that this person can see clearly with the wrong lenses
A 64kg human sprinter can accelerate from rest to 10 m/s in 3.0s . During the same time interval, a 28kg greyhound can go from rest to 20 m/s. What is the average power output of the human
A river narrows at a rapids from a width of 15m to a width of only 6.0m. The depth of the river before the rapids is 2.7m ; the depth in the rapids is 0.70m. Find the speed of water flowing in the rapids
12 Gallons per minute of water flows through a heater and must be raised from 20 to 90 Celcius. Calulate the rate of heat supplied
A bucket is filled with a combination of water (density 1000 kg/m3) and oil (density 700 kg/m3). what is the pressure at the interface between the oil and the water
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