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A hollow, conducting sphere with an outer radius of 0.256 and an inner radius of 0.190 has a uniform surface charge density of +6.91×10?6 . A charge of -0.690 is now introduced into the cavity inside the sphere. What is the new charge density on the outside of the sphere? Calculate the strength of the electric field just outside the sphere What is the electric flux through a spherical surface just inside the inner surface of the sphere?
An ice skater is rotating at 3.4rev/seconds while her arms are beside her. The moment of inertia of the skater is 5kg x m^2. what is her new angular velocity
Two long parallel wires each carry a current of 5. A directed to the east. The two wires are separated by 8 cm. What is the magnitude of the magnetic field at a point that is 5.0 cm from each of the wires.
A box with a volume V = 0.03 m3 lies at the bottom of a lake whose water has a density of 103 kg/m3, How much force is required to lift the box, if the mass of the box is 1510 kg
A 63kg person rides in a 30kg cart moving at 14m/s at the top of a hill that is in the shape of an arc of a circle with a radius of 30m. What is the apparent weight of the person as the cart passes over the top of the hill
one specific federal funding organization for scientific research and education is the national science foundation nsf.
A 1000kg car moving 40m/s skids to a stop. During the skid, the only force is the frictional force between the tires and the road, which is 6000N. find the distance the car moves before coming to a stop
A parallel plate capacitor is made of two parallel disks of metal separaded by a gap. The radius of the disk is 2.0m, the distance between the plates .25m. What is the energy stored in the capacitor
What is the tension in the string
A Charge of Q=700nC is uniformly distributed throughout a circular disk of radius R =10 cm, What are the magnitued and direction of the electric and magnetic field at the center of the rotating charge
We have a container of a hot ideal monatomic gas. The volume of the container is 25 liters. The temperature of the gas is 398 C, Find the change of internal energy of the gas
A block of mass m1 = 3.90 kg on a frictionless inclined plane of angle 30.0° is connected by a cord over a massless, What is the magnitude of the tension in the cord
A ball is thrown horizontally from a height of 16.2 m and hits the ground with a speed that is three times its initial speed. What was the initial speed?
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