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Assume a uniformly charged ring of radius R and charge Q produces an electric field Ering at a point Pon its axis, at distance x away from the center of the ring. Now the same charge Q is spread uniformly over the circular area the ring encloses, forming a flat disk of charge with the same radius. How does the field Edisk produced by the disk at P compare with the field produced by the ring at the same point? (a) Edisk < Ering (b) Edisk = Ering (c) Edisk > Ering (d) impossible to determine
upon what properties of the sound wave do the a loudness b pitch and c quality of a musical note depend? why do the
A 0.39 cm high object is placed 8.7 cm in front of a diverging lens whose focal length is -7.5 cm. What is the height of the image
A steel wire is used to stretch a spring. An oscillating magnetic field drives the steel wire back and forth. what stretch of the spring produces a standing wave with six nodes
A mine elevator is supported by a single steel cable 2.8 cm in diameter. The total mass of the elevator cage and occupants is 520 kg. By how much does the cable stretch when the elevator hangs by (a) 13 m of cable and (b) 364 m of cable? (Neglect the..
Two identical pucks are on an air table. Puck A has an initial velocity of 2.5 m/s in the positive x-direction. What is the speed and direction of puck B after the collision
What current is required in the windings of a long solenoid that has 1050 turns uniformly distributed over a length of 0.380 m in order to produce a magnetic field of magnitude 1.00 x 10-4 T at the center of the solenoid
A H2 molecule can be approximated by a simple harmonic oscillator having spring constant k= 1.1 x 1033 N/m. Find the energy levels
Illustrate what is the concentration of sodium and chloride ions at a distance 3 angstroms from protein surface.
The average atmostpheric pressure Po on the surface of Mars is 6.0hPa. The radius of the planet is r = 3400 km. The acceleration dueto gravity is 3.7m/s^2. Compute the total mass M of the Martianatmosphere. Express M is Kg
A wheel rotates without friction about a stationary horizontal axis at the center of the wheel. What is the moment of inertia of the wheel
A loop on the left is a closed conducting loop. While the right loop has a current flowingthrough it in a clockwise direction and the current is INCREASING.The direction of flow of the induced current in the left loop is
A 2200 kg elevator is attached to a 1500 kg counterweight. What power must the motor supply to raise the elevator at 0.5 m/s
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