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Three charged particles are fixed to an x axis: Particle 1 of charge q1 = 2.1e-8 C is at position x=20 cm and particle 2 of charge q2 = 2.00q1 is at position x = 30 cm, particle 3 of charge q3 = -4.00q1 is at position x = 70 cm. At what coordinate on the axis (other than infinity) is the net electric field produced by the three particles equal to zero? There are actually two answers here. Enter the one for which x>0
Two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. Transferring 1.70 x 10^9 electrons from one disk to the other causes the electric field strength to be 2.60 x 10^5 N/C. What are the daimeters of the disk?
(a) If the elevator moves with an upward acceleration a with arrow of magnitude 2.0 m/s2, find the tensions T1 and T2 in the upper and lower strings. T1 = N T2 = N
A laser used to weld detached retinas emits light with a wavelength of 652{\rm nm} in pulses that are 20.0{\rm ms} in duration. What is the energy of one photon in electron volts
What angular velocity would be required to give a rotating object of mass 25 kg and a radius of 2 m a centripetal force of 50 N
water flows with a speed of 2.00 m/s through a horizontal 15 cm diameter pipe and is bent along the centerline of the pipe to face the oncoming flow. How high does the water rise in the tube
An electron and a positron each have a mass of 9.11 x 10-31 kg. determine the energy of the electromagnetic radiation
A river flows due south with a speed of 2.30 . A man steers a motorboat across the river; his velocity relative to the water is 4.40. What is the velocity of the boat relative to the earth
During this experiment the first step in the procedure was the measurement of the string's mass and total lenght, Calculate lthe linear mass density of the string in g/cm
A horizontal force of 80 N acts on a mass of 6 kg resting on a horizontal surface. The mass is initially at rest and covers a distance of 5 m in 0.92 s under the action of the force. find the coefficient of friction between the mass and the surface
A biology student rides her bike around a corner of radius 25 meter at a steady speed of 8.2 m/sec. If she is not skidding, what is the magnitude of the force of friction on her bike from the road
On a frictionless surface, a sliding box collides and sticks to a second identical box that is initially at rest. What percentage of the initial kinetic energy of the system
Under controlled darkened conditions in the laboratory, a light receptor cell on the retina of a person's eye can detect a single photon of light of wavelength 505 nm, What is the intensity (in W/m^2) delivered to a rod
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