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While carrying out an experiment you watch an electrically charged microscopic drop of oil (mass 5.68 micrograms, diameter 0.48 mm and electric charge of -96e) that is slowly falling vertically in an evacuated chamber toward a small flat, electrically charged surface. After a while you notice that the drop comes to a stop and remains suspended motionless, 3.50 mm above the flat surface. What is the minimum amount of charge that should be on the flat surface? Suppose that the drop and the charged flat surface might be considered to be point charges and as the drop falls it (the drop) does not gain or lose any electrical charge or mass. Also, suppose that at the location where you are the acceleration due to gravity is 9.83 m/
A curve of radius 60m is banked for a design speed of 100km/h.If the coefficient of static friction is .30 (wet pavement), at what range of speeds can a car safelymake the curve.
A 51.0 kg woman balances on one heel of a pair of high-heeled shoes. If the heel is circular and has a radius of 0.400 cm, what pressure does she exert on the floor
-What is the total force on the bottom of a swimming pool 13.0 m with 5.8 m whose uniform depth is 1.9 m? What is the absolute pressure on the bottom of a swimming pool? What will be the pressure against the side of the pool near the bottom?
After hitting a long fly ball that goes over the right fielder's head and lands in the outfield, If the player comes to rest at third base, how much work was done on the player by friction
consider children playing on a merry go around that is 6m in diamter turning at 10 revelutions per minute. what will
An object is placed in front of a concave mirror with a 24.1-cm radius of curvature. A real image twice the size of the object is formed. At what distance is the object from the mirror
You drop a 12-g ball from a height of 1.5 m and it only bounces back to a height of 0.81m. What was the total impulse on the ball when it hit the floor
An airplane is flying through a thundercloud at a height of 2300 m. (Flying at this height is very dangerous because of updrafts, turbulence, what is the electric field at the aircraft
Consider two bobs of equal mass, but different size, both tied tothe same length of string. Which pendulum has a longer period
A coin placed 11.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 36 rpm is reached and the coin slides off.
A baseball outfielder throws a 0.150 kilogram baseball at a speed of 40.0 m/s and an initial angle of 30 degree. Find the kinetic energy of baseball at highest point of its trajectory
While remodelling your garage, you need to temporarily splice, end to end, an 80 m long copper wire that is 1.130 mm in diameter with a 49.0 m long aluminium wire that has the same diameter. The maximum current in the wires is 2.00 A.
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