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Two positive charges of 1.7e-10 C are placed on the x axis at distances +20 cm and -20 cm from the origin, respectively. A third positive charge of 1.5e-11 C can be moved along the y axis. At what value of y the electrostatic force on the third charge is maximal?
White light, with frequencies ranging from to , is incident on a potassium surface. Find the maximum kinetic energy of electrons ejected from this surface
Estimate the terminal velocity for a dust particle in air. Assume it has a radius of 1.0 um and a density similar to that of balsa wood
The drawing shows a wire composed of three segments, AB, BC, and CD. There is a current of I = 2.0 A in the wire. Find the magnitude of the force that acts on each segment
The angle between the electric field vector and the vector normal to the rectangular plane is 65.0 degrees. Illustrate what is the electric flux through the rectangle?
A uniform magnetic field passes through a horizontal circular wire loop at an angle 15.1° from the normal to plane of the loop. Find the magnetic flux through the loop
An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.0 cm, and length 25 cm. What is the relative permeability KB of the iron core
a 2. kg ball moving to the right with a speed of 25m/s collides with a 15. kg ball going in the same direction with the speed of 20 m/s. What is the speed of the second ball after collision if it travels in the same direction as before
questiona common misconception is that current is used up and steadily declines as it progresses through a series of
A step-up transformer has 24 turns on the primary coil and 780 turns on the secondary coil. what input current and voltage are needed
A sinusoidally varying voltage is represented by V(t) = (75 V)sin(120?t). What are its frequency and peak voltage
A cylindrical aluminum pipe of length 1.33 m has an inner radius of 1.90 10-3 m and an outer radius of 3.00 10-3 m. What is the resistance of this unit
At time t = 0, the hockey puck is sent sliding over a frozen lake, directly into a strong wind. Gives the velocity v of the puck versus time as puck moves along a single axis. (The time axis is marked in increments of 0.25 s.) At t = 2.8 s, what i..
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