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Three charges are arranged as shown in the figure below. Find the magnitude and direction of the electrostatic force on the charge q = 5.22 nC at the origin. (Let r12 = 0.245 m.)
The work needed to remove an electron from the surface of sodium is 2.3 eV. How big maximal velocity will have electrons if the surface of sodium will be illuminated with ultraviolet light wave length
You have a concave spherical mirror with a 13.3-cm radius of curvature. You place an object on the mirror's axis, 19.7 cm in front of the mirror
A .060-kg tennis ball, initially moving 5.50 m/s, has a head on collision with a .090-kg ball initially moving in the same direction, determine the Speed and direction of each ball after collision
A particle executes simple harmonic motion with an amplitude of 7.1 cm. At what displacement (in cm) from the midpoint of its motion will its speed equal one half of its maximum speed?
A high-frequency photon is scattered off of an electron and experiences a change of wavelength of 8.0×10-4 .At what angle should a detector be placed to detect scattered photon (relative to the direction of the incoming photon).
A solid non-conducting sphere has a uniform volume charge density and a radius of 6 cm. The total charge on the sphere is 2nC.
A 3.60 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest. What is the mass of the second sphere
A spherical water drop 2.6 ?m in diameter is suspended in calm air due to a downward-directed atmospheric electric field of magnitude E = 3800 N/C. How many excess electrons does it have
In a 6.5×10?3-m3 volume of ideal gas at the pressure of 2.7×106 Pa, How many molecules are in the sample
Automobile windshield wipers can be used intermittently during rainfall. what determines the length of the intervals when the wiper is on and when it is off
A river has a steady speed of 0.350 m/s. A student swims upstream a distance of 1.00 km and swims back to the starting point. If the water were still, by how much would the trip be longer or shorter
A boat is heading upstream when a float is dropped overboard and carried downstream. What is the boats speed in still water
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