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An alpha particle (m = 6.68×10-27 kg, q = 3.20×10-19 C) circularly orbits a charged sphere at a radius of 5.00 cm from the sphere's center. The electric attraction between the two objects provides the centripetal force to keep the particle in orbit. The orbital speed of the particle is 6.480e+4 m/s. What is the charge on the sphere?
In a local bar, a customer slides an empty beer mug on the counter for a refill. The bartender is momentarily distracted and does not see the mug, with what velocity did the mug leave the counter
A lump of mass 1.0 kg falls on it and sticks to the surface at a distance 0.7 m from the center. a) calculate the new angular speed of the disc b) if the lump gets unstuck and rolls of the disc.
An AC generator has an output rms voltage of 58 V at a frequency of 76 Hz. If the generator is connected across a 30 mH inductor, find the inductive reactance
Two ac generators supply the same voltage. However, the firstgenerator has a frequency of 1.5 kHz, and the second has afrequency of 6.4 kHz. When an inductor isconnected across the terminals of the first generator, the currentdelivered is 0.55 A.
7.4 kg crate slides on a horizontal surface. The coefficient of kinetic friction between the surface and the crate is 0.365. find the magnitude of the external force acting on the crate
the normal human eye has maximum visual acuity with a pupil size of about 3 mm. for larger pupils acuity decreases due
A solid cylinder carries a current that is uniform over its cross section. Where is the magnitude of the magnetic field the greatest ?
A stationary radar operator determines that a ship is 13km south of him. An hour later the same ship is 23km southeast. If the ship moved at constant speed and always in same direction, what was its velocity during this time? (Hint: Take the origi..
ball A is dropped (starting at rest) from the top of a buildingof heighth at the sameinstant that ball B is thrown vertically upward from the ground. At what height does the collision occur
a coil of nichrome wire is 31.0 m long. the wire has a diameter of 0.360 mm and is at 20.0degc. a if it carries a
When the galvanometer in a wheatstone bridge circuit shows no deflection, explain why are the voltages across opposite branches on each side of the galvanometer necessarily equal?
A simple harmonic oscillator consists of the block of mass 1.90 kg attached to a spring of spring constant 196 N/m. while t = 3.00 s, position and velocity of the block are x = +0.129 m and v = +3.415 m/s.
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