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The density of copper is 8.91 g/cm3, and its atomic mass is 63.5. Assuming each copper atom contributes one mobile electron to the metal, obtain the number density of free charges in the wire, in electrons/m3? Use your results to determine the drift speed of the electrons in the wire?
A 168N sign is supported from its top surface by two ropes that each make a 22.5o angle with the horizontal. The sign is not moving. How much force is in each rope
The electric field at the surface of a charged, solid, coppersphere with radius 0.210 m is3380 N/C directed toward the center ofthe sphere. What is the potential at the center of the sphere, ifwe take the potential to be zero infinitely far from thes..
In an experiment designed to measure the speed of light, a laser is aimed at a mirror that is 49.0 km due north. A detector is placed105 m due east of the laser. The mirror is to be aligned so thatlight from the laser refelects into the detector
A thin film of alcohol (n = 1.28) lies on a flat glass plate (n =1.54). What is the thickness of the film
A metal wire has a resistance of 8.00 at a temperature of 20°C. If the same wire has a resistance of 10.85 at 90°C, what is the resistance of the wire when its temperature is -20°C
Iron atoms have been detected in the sun's atmosphere, some with many of their electrons stripped away. What is the net electric charge (in coulombs) of an iron atom
At one point in a pipeline the water's speed is 3.00m/s and the gauge pressure is 5.00x10^4Pa. Find the gauge pressure at a second point in the line
At 273 K and 1.00 x 10^-2 atm, the density of a gas is 1.24 x 10^-5 g/cm3. Find the Molar Mass of the gas
A circular loop of flexible iron wire has an initial circumference of 167 cm, Find the magnitude of the emf induced in the loop after exactly time 7.00 seconds has passed since the circumference of the loop started to decrease
The experiment you did in lab is repeated, using a uniform metal bar that is 80.0 cm long instead of the meterstick. Since the bar is uniform, What is the mass of the bar?
The earth orbits the sun once a year (3.16 x 10^7 s) in a nearlycircular orbit of radius 1.50 x 10^11 m. With respect to the sun,determine the magnitude of the earth’s centripetal acceleration.
A rod of mass 0.720 kg and radius 6.00 cm rests on two parallel rails (see figure below) that are d = 12.0 cm apart and L = 45.0 cm long. what is the speed of the rod as it leaves the rails
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