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Long Straight Wire A long straight wire has fixed negative charge with a linear charge density of -3.1 nC/m. The wire is to be enclosed by a thin,nonconducting cylinder of outside radius 1.6 cm, coaxial with the wire. The cylinder is to havepositive charge on its outside surface with a surface chargedensity σ such that the net external electric fieldis zero. Calculate the required σ.
a 5g snail crawls at 0.6mm/s between two rocks 14 cm apart. Treating this system as an infinite square well, determine the approximate quantum number
A bullet of mass m and speed v passes completely through a pendulum bob of mass M. The bullet emerges with a speed v/2. The pendulum bob is suspended by a stiff rod of length and negligible mass. What is the minimum value of v such that the pendulum ..
How greatly time elapses before the compass hits the ground
In a women's 100-m race, accelerating uniformly, Laura takes 1.87 s and Healan 3.12 s to attain their maximum speeds, find the maximum distance by which Healan is behind Laura
Two ice skaters, Daniel (mass 70.0 ) and Rebecca (mass 45.0 ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, What is the magnitude of Daniel's velocity after the collision
One particle has a mass of 2.00 10-3 kg and a charge of +7 µC. A second particle has a mass of 5.00 10-3 kg and the same charge. Find the initial separation between the particles
An optical system is designed so that an object for a convex spherical mirror of focal length f=15 cm is 20 cm behind the mirror, determine whether the image is real or vertual, erect or inverted
A man is to pull a 50 .0 kg crate across a level terrain with a force of 50.0 N. What is the coefficient of kinetic friction, if the work done by friction is - 4.30 x 102 J
A planet of mass m = 7.05 × 1024 kg is orbiting in a circular path a star of mass M = 4.95 × 1029 kg. The radius of the orbit is R = 8.35 × 107 km
A large water tank has an inlet pipe and an outlet pipe. The inlet pipe has a diameter of 3 cm and is 1 m above the bottom of the tank. What is the velocity of the water in the outlet pipe
A 2300 kg truck traveling north at 39 km/h turns east and accelerates to 57 km/h. What is the change in the truck's kinetic energy
Michelle is enjoying a picnic across the valley from a cliff. She is playing music on her radio (assume it to be an isotropic source) and notices an echo from the cliff. what is the intensity of the music arriving at the cliff
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