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An electron is sent at high speed toward a gold nucleus (charge +79e). What is the elctrical force acting on the elctron when it is 3.0e-14m away from the gold nucleus? (e=1.6e-19C, K=8.99e9)
An infinite plane of charge (see figure below) has a charge perunit area of σ = 2.7 µC/m2. What is the change in the electric potential between points that are2.3 m (initial) and 4.6 m (final) from the plane?
design a crane that will sit on a boat and drop a 1meter by 1 meter by 1 meter box to pick up 10cm steel balls. we need
An electrically neutral model airplane is flying in a horizontal circle on a 4.0-m guideline, which is nearly parallel to the ground. Find the magnitude of the charges
A small sphere that carries a chargeq is whirled in a circle at the end of an insulatingstring. The angular frequency of rotationis ω. What average current does this rotatingcharge represent?
Suppose your waffle iron is rated at 1.20 kW when connected to a 3.00 102 V source. What current does the waffle iron carry
A resistor with R = 2.4 k? is connected to an AC generator that operates at 60 Hz with an amplitude of 41 V. Find the average power dissipated in the resistor
A 1.80 kilogram block slides on a rough, horizontal surface. The block hits a spring with a speed of 1.80 m/s and compresses it a distance of 11.0 centimeter before coming to rest
A box of textbooks of mass 24.7 kg rests on a loading ramp that makes angle a with the horizontal. The coefficient of kinetic friction is .25 and the coefficient of static friction is .37. Find out the minimum angle at which the box starts to sl..
An electron moving with a speed of 4.7×105m/s in the positive x direction experiences zero magnetic force. Find the components of the magnetic field
the wavelength of one sound wave is 0.81 m. the wavelength of a second sound wave is a little bit longer. when the two
Four ideal linear sheet polarizers are stacked one behind the other with the transmission axes of the first vertical, the second at 30°, the third at 60°, What fraction of the incident unpolarized light emerges
An object of mass M= 4.3 kg is suspended from a spring of constantk = 1.42 N/m. What is the displacement of the end of the spring dueto the weight of the mass?
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