A21 kg chair initially at rest on a horizontal floor requires a 175 n horizontal force to set it in motion. once the chair is in motion, a 137 n horizontal force keeps it moving at a constant velocity. the acceleration of gravity is 9.81 m/s 2 . a) what is the coefficient of static friction between the chair and the floor?
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An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?
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Examine the equation. 23490thβ23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block
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In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_
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A21 kg chair initially at rest on a horizontal floor requires a 175 n horizontal force to set it in...
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