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N=7 equal charges are located in the seven sides of a symmetrical octagon, distance R from the center. Obtain the direction and magnitude of the electric field at the center of the octagon.
A 1.3-µF capacitor is connected to a 4.7-V battery. What is the magnitude of the charge on each plate?
A 5.20 102 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 104 J of work on the balloon in the process. At what height above the surface of the earth does t..
A 15,000 kg F-18 (jet fighter) lands at 50 m/s on an aircraft carrier, its tail hook snags the cable to slow it down. The cable is attached to a spring with a spring constant of 62,000 N/m. How far does the spring stretch to stop the jet?
A screw with 15 threads per centimeter is driven 1.01 cm into its fixture in 11.2 s with a cordless electric screwdriver. What is the average angular speed of the screwdriver
A race driver has made a pit stop to refuel. After refueling,he leaves the pit area with an acceleration whose magnitude is6.3 m/s2; how much time is required for it to catch the other car
The amplitude of a lightly damped oscillator decreases by 2.8% during each cycle. What percentage of the mechanical energy of the oscillator is lost in each cycle?
The distance to a star is approximately 4.50 x 1018 meter. If this star were to burn out today, in how many years would we see it disappear
A uniform disk of mass M=12.0 kg and radius R=.75 m is free to rotate about a frictionless axle through its center. compute the roational kinetic energy
If a force of 300N is exerted upon a 60 kg mass for 3 seconds, how much impulse does the mass experience
A solenoid 30 cm long has 2900 turns of wire and carries a current of 5.7 A. Find the magnetic field at the common center
A uniform block of granite in the shape of a book has face dimensions of 23.0 centimeter and 23.6 centimeter and a thickness of 1.97 centimeter. Obtain its rotational kinetic energy about that axis
A Block A block in the shape of a rectangularsolid has a cross-sectional area of 4.00cm2 across its width, a front-to-rear length of15.1 cm, and a resistance of 925 . The material of which the block is made has 5.33 multiplied by 1022 conduction e..
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