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Two positive point charges, each 17 , lie along the -x axis at x = -0.15 and x = +0.15 . Find the electric field at the point (0, 0.25 ) on the -axis. Express your answers using two significant figures. Enter the x and y components of the field separated by a comma.
A slab of a thermal insulator with a cross-sectional area of 120cm2 is 3.00cm thick
A factory worker pushes a 28.7 crate a distance of 4.9 along a level floor at constant velocity by pushing downward at an angle of 29 below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26 What magnitude of forc..
A railroad car of mass 25,000 kg is moving with a speed of 5.50 m/s. It collides and couples with three other coupled railroad cars, each of the same mass as the single car and initially at rest.
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 10^4 m/s, and the radius of the orbit is 5.50 10^6 m. What is the orbital speed of the second satellite
A massless, rigid board is placed across two bathroom scales that are separated by a distance of 2.06 m. Locate the center of gravity of the person relative to the scale beneath his head
most species of fish have expandable sacs commonly known as swim bladders that enable fish to rise in the water by
A soccer ball is kicked at 30 degrees to the horizontal at a speed of 24m/s. How far will it go over a level ground
A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C-1). To what temperature must the frames be heated
when you place a saltshaker 30 cm from your magnifying glass a real image forms 30 cm from the lens on the opposite
A properly motivated kangaroo can jump over an object. what is the velocity of the kangaroo, just when it returns to the ground
Train car 1 has a mass of 6.5 x 10^4 kg and is sitting stationary on a track. Train car 2, with a mass of 9.30 x 10^3 kg, What is the speed of Train car 1 after the collision
two blocks of mass 3 kg and 6 kg resp are placed on a smooth horizontal surface. they are connected by a light spring
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