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Two point charges lie on the x-axis. A charge of +2.40 pC is at the origin, and a charge of -4.80 pC is at x=-0.1m. What third charge should be placed at x=+0.2m so that the total electric field at x=+0.1m is zero?
A particle with a charge of -60.0 nC is placed at the center of a nonconducting spherical shell of inner radius 20.0 cm, Calculate the speed of the proton
A block of wood 34 cm wide and 85 cm tall is placed on a merry-go-round which rotates at 0.95 rad/s. How far from the center may the block be placed before it will tip over?
A 60kg block slides along the top of a 100kg block with an acceleration of 2.0m/s^2 when a horizontal force of 350N is applied. Find the coefficient of kinetic friction between the blocks
A screw with 25 threads per centimeter is driven 1.49 cm into its fixture in 12.4 s with a cordless electric screwdriver. What is the average angular speed of the screwdriver
Atoms can be ionized by thermal collisions at very high temperatures. One such ion is Ne9+, a neon atom with only a single electron. What is the wavelength of the first line in this ion's Lyman series?
Mike lifts a 15 kg cubical crate from the floor if his apt until it is flat against the ceiling. How much work against gravity does Mike do in lifting the crate
The position function x(t) of a particle moving along an x axis is x = 4.0 - 4.5t2, with x in meters and t in seconds. At what negative time does the particle pass through the origin
An 7.40-cm-diameter, 300g solid sphere is released from rest at the top of a 1.90-m-long, 20.0? incline. It rolls, without slipping, to the bottom. What fraction of its kinetic energy is rotational
A converging lens and a diverging lens, separated by a distance of 30.0 cm, are used in combination. What is the focal length of the diverging lens
One force is 60.0 N along the x-axis, the second is 75.0 N along a direction making a counterclockwise angle of 150.0° with the x-axis. Illustrate what is the magnitude of the third force?
When light with a wavelength of 262 nanometers is incident on a certain metal surface, Find the wavelength of light that should be used to double the maximum kinetic energy of the electrons ejected from this surface
Suppose 12.5 g of oxygen (O2, 32.0 g/mol) is heated at constant atmospheric pressure from 19.0°C to 100°C. How many moles of oxygen are present
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