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Four point charges, q, are fixed to the four corners of a square that is 11.2 cm on a side. An electron is suspended above a point at which its weight is balanced by the electrostatic force due to the four point charges, at a distance of 11 nm above the center of the square. (The square is horizontally flat, and the electron is suspended 11 nm vertically above the center of the square.) What is the magnitude of each fixed charge in coulombs?
What is the magnitude of each fixed charge as a multiple of the electron's charge?
Two lenses, one converging with focal length 20.5 cm and one diverging with focal length - 12.0cm , are placed 25.0 cm apart. Determine the magnification of the final image formed
An airplane, diving at an angle of 48º with the vertical, release a projective at an altitude of 830m. What was the vertical component of its velocity
A bunch of grapes is placed in a spring scale at a supermarket. The grapes oscillate up and down with a period of 0.32s, What is the weight of the grapes
A golf ball of mass 0.045 kg is hit off the tee at a speed of 33m/s. Find the average force exerted on the ball by the golf club
question1a 35 kg uniform ladder is leaned against a building. the 5 meter tall ladder makes an angle of 60 degrees with
A 10. kg blocks rests on a table (on Earth) and 0.50 is the coefficient of static friction. what is the maximum horizontal pull that will not move the block
A car of mass 1200 kg turns a corner inclined at 55 deg at a speed of 20 m/s. What is the maximum radius for the curve at which the car will not slide down the incline
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 54 dB by an observer 10 km away. What is the average power generated by the horn
An air-filled toroidal solenoid has a mean radius of 13.0 cm and a cross-sectional area of 5.80cm^2. How many turns does the winding have
A solid cube of iron (density = 7.87 g/cm3) has a mass of 88.0 g. What is the resistance between opposite faces of the cube
It is believed that the universe began with a big bang about 17 billion years ago. If the speed of light is 2.99792 × 10^8, what is the maximum possible radius of the observable universe
A child runs down a 10 degree hill and then suddenly jumps upward at a 17 degree angle above horizontal and lands 1.5 m down the hill as measured along the hill. what was the initial speed?
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