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Two large, parallel, conducting plates are 23 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of2.5 10-15 N acts on an electron placed anywhere between the two plates. (Neglect fringing).
a) Find the magnitude of the electric field at the position of the electron.b) What is the potential difference between the plates?
rotates to provide an "artificial gravity" of 3.10 m/s2 for persons who walk around on the inner wall of the outer rim. Find out the rate of the wheel's rotation in revolutions per minute that will produce this effect.
Two compact sources of sound oscillate in phase with a frequency of 120 Hz where the speed of sound is 340 m/s. What is the amplitude of the resultant wave at that point
The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.95 cm2 and a length of 1.84 cm. what mass of ethanol diffuses through the cylinder
a boy is riding a bicycle which has tires with a diameter of 62cm. if he travels a distance o f 0.320km in a time of 1.00 minutes. what would the angular acceleration of the tire be
A rod (length = 80 cm) with a rectangular cross section (1.5 mm ? 2.0 mm) has a resistance of 0.20 ?. What is the resistivity of the material used to make the rod
an ice chest at a beach party contains 10 cans of soda at 2 deg c. each can of soda has a mass of 0.36 kg and a
A NASCAR racecar rounds one end of the Martinsville Speedway. This end of the track is a turn with radius approximately 57.0 m. What is the force responsible for the centripetal acceleration in this case
an electron emitted by a heated cathode and accelerated through a potential difference of 2.0 kv enters a region with
A snowboarder of mass 86 kg travels down the slope of height 150 m, what is the work done on her by friction
Common sports injuries result in the tearing of tendons and ligaments due to over stretching. how far must it be stretched from its relaxed length to tear it
A wind turbine with a rotor diameter of 50 m is rated at 2500 kW at a hub height wind speed of 10 m/s. Calculate the number of hours per year that the wind is below the cut-in speed
A cylindrical copper rod has resistance of 0.3 ohm. It is reformed to 3.8 timesm its original length with no change of volume. What is its new resistance in ohms?
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