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Four identical and well separated spheres. Sphere W (initial charge 0) touches sphere A and is separated. W touches B (initial charge -32e) and they are separated. Finally W touches C (initial charge +48e) and they are separated. Final charge on W is +18e. What is the initial charge on A?
Calculate the mass of a solid gold rectangular bar that has dimensions lwh = 4.30 cm 10.0 cm 20.0 cm. (The density of gold is 19.3 103 kg/m3.)
A magnesium surface has a work function of 3.68 eV. Calculate the maximum kinetic energy of the ejected electrons
A stone is dropped into a river from a bridge 41.9 m above the water. What is the initial speed of the second stone
two forces one equal to 15 n and another equal to 40 n act on a 50-kg crate resting on a horizontal surface.a. what is
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 18cm. what's the balloon's new radius
you are kidnapped and put blindfolded in an elevator at the ground floor of a building. What is the approximate floor number your room is on
What is the tangential acceleration of a bug on the rim of a 13.0-in.-diameter disk if the disk accelerates uniformly from rest to an angular speed of 76.0 rev/min in 4.60 s? 0.29 m/s2
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons, How many electrons are there in 1.79 liters of water
A long straight cylindrical wire conductor of radius R carries a current I of uniform current density in the conductor. Find the magnetic field outside the wire
Describe its motion. (Will it slide forever at a constant velocity? Will it slide to a stop? Illustrate in what way will its energy changes be similar to that of a pendulum?)
A 9.00-V battery delivers a current of 1.37 A to the lightbulb filament of a pocket flashlight. How many electrons pass through the filament
A permanent magnet is hung from a string ( balanced ) and pointed in an East - West orientation and released. Describe its motion
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