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Three point charges are placed at the vertices of a rectangle as shown. (a) Determine the magnitude and direction of the net electric field at the vacant vertex, as shown. (b) What electric force will be exerted on a fourth charge, q4 = -20 nC, placed at the same vacant vertex?
The electric potential at the surface of a conducting,spherical shell of radius R is V > 0 relative to Earth ground.True or False? The magnitude of the electric potential at a distancer=2R from the center of the shell is V/2.
During the launch from a board, a diver's angular speed about her center of mass changes from zero to 4.50 rad/s in 220 ms. FIND the magnitudes of her average angular acceleration
A man with a mass of 71.3 kg stands up in a 61-kg canoe of length 4.00 m floating on water. How far does the canoe move
The mean lifetime of muons in their rest frame is 2.20 ?s. Now consider a muon traveling through the Earth's atmosphere at a speed of 0.999 c. What is the mean distance traveled before it decays?
After a completely inelastic collision between two objects of equalmass, each having initial speed v, What was the angle between their initial directions
Consider a solid metal conductor in static equilbrium. What is the electric field inside the conductor
A section of hollow pipe and a solid cylinder have the same radius and mass. Which has the most rotational kinetic energy
An infinite line of positive charge lies along the y axis, with charge density ? = 1.60 ?C/m. Find the magnitude of the net torque exerted on the dipole
Two horses pull a large crate of negligible mass at constant speed across a barn floor by means of two light steel cables. What is the work done by each horse if the box is moved a distance of 29 m
A railroad train is traveling at 30.0 m/s in still air. What frequency is heard by a passenger on a train moving in the opposite direction to the first at 18.0 m/s and approaching the first
A U-tube contains liquid of unknown density. An oil of density 787kg/m3 is poured into one arm of the tube until the oilcolumn is 11 cm high. Find the density of the liquid
If friction and air resistance can be neglected, determine her speed vB when she reaches the horizontal end of the ramp at B.
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