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A 20-cm-radius ball is uniformly charge to 80nC. (26=4+5+5+6+6 points)
What is the ball's volume charge density?
How much charge is enclosed by spheres of radii 5, 10 and 20 cm?
What is the electric field strength at points 5, 10, 20, 25 and 35 cm from the center?
Draw the graph of the charge enclosed, Qencl with the distance r from the center of the sphere for 0<r<35 cm.
Draw the graph of the electric field, E(r) with the distance r from the center of the sphere for 0<r<35 cm.
A gymnast of mass 56.0 {rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 {rm m/s^2} for the acceleration of gravity.
Point charges, Q1 = +46 nC and Q2 = -75 nC, are placed as shown. The work done by the external force is closest to
The light ray makes an angle of α = 32.1° with the normal line at the boundary of linseed oil and water. find the angles θ1 and θ2. Note that n = 1.48 for linseed oil.
During a recent thunderstorm the wind was blowing past your roof at 40 m/s. Assuming that the density of air is 1.20 kg/m^3, What is the net force experienced by the roof
A circular loop of wire with areal A lies in the xy-plane. As viewed along the z-axis looking in the -z direction toward the origin, Determine the vector magnet moment of the current loop
A 7.4- g piece of silver undergoes isochoric heating, By how many joules does the internal energy change
A 100 kg crate is being pushed across the horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.230. What must be the magnitude of, so that the net work completed by it and the kinetic..
Air in a balloon does 46 J of work while absorbing 94 J of heat. What is the change in internal energy
The nucleus of a 125Xe atom (an isotope of the element xenon with mass 125 u) is 6.0 fm in diameter. It has 54 protons and charge q =+54e. What is the electric force on a proton
Calculate the electrical potential at the center of the square described as follows: Four charges are placed at the corners of a 20 cm square
A planet orbits the sun with a period of 14 years? How far is the planet from the sun
A flexible chain weighing 37.0 N hangs between two hooks located at the same height. Find the magnitude of the force each hook exerts on the chain
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