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An aluminum wire having a cross-sectional area of 3.00 10-6 m2 carries a current of 4.2 A. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume one electron is supplied by each atom.)
An unknown capacitor is charged by a 100-V source through a 1 M? resistor. determine the capacitance of the capacitor
According to a report on traumatic brain injury, the force that a professional boxer's fist exerts on his opponents head is equivalent to being hit with a 5.9 kg bowling ball traveling at 8.9 m/s that stops in .018s
Two point charges are on the y axis. A 3.30-µC charge is located at y = 1.25 cm, and a -2.06-µC charge is located at y = ?1.80 cm. Find the total electric potential at the origin
If n=10, what is the largest value of the angular momentum l in this shell, How many electrons can be placed in this shell
A satellite moves around the earth in a circular orbit at a constant speed of 5000m/s. find the radius of the orbit
Two tiny conducting spheres are identical and carry charges of -29.4C and +70.0C. They are separated by a distance of 2.66 cm. (a) What is the magnitude of the force that each sphere experiences?
consider two solid disks of identical radius and thickness. one of the disks is made of aluminum (density=2.7g/cm), what is the ratio between the two moments of inertia
A 3.6- cm-radius ball rolls down an inclined plane from rest at the top. The angular acceleration of the rolling ball about its center is 255 rad/s2, How long is the plane
There is a uniform electric field throughout the region given by E = 4.9i + 7.1j + 3.6k in N/C units, What is the magnitude of the total flux through the five non-shaded faces
Heat engines take input energy in the form of heat, use some of that energy to do work, and exhaust the remainder. Determine the magnitude of the heat the athlete gives off
A swimming pool requiring a 2.0 hp motor to filter and circulate the water runs for 18 hours a day. What is the monthly electricity cost for running this pool pump
An green hoop with mass mh = 2.7 kg and radius Rh = 0.17 m hangs from a string that goes over a blue solid disk pulley with mass md = 2.3 kg and radius Rd = 0.09 m. What is magnitude of the linear acceleration of the hoop
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