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Distinguish between alternating current and direct current. Why are home appliances connected in parallel rather than in series? Compare the law of charges and the law of poles
A computer monitor accelerates electrons and directs them to thescreen in order to create an image. If the acceleratingplates are 1.05 cm apart, and have a potential differenceof 2.00×104 V, find the change in electricpotential energy for any elect..
A weightlifter bench-presses a 130.0 kg barbell from his chest to a height equal the length of his arms 0.850 m. How many food calories does the weightlifter use if he does this lift 35 times
Consider a particle with positive charge q = 8.00 * 10^18 C moves with velocity v=(4i + 2j - k) m/s through a region, calculate the total force on the moving particle
An electric vehicle starts from rest and accelerates at a rate of 2.4 m/s2 in a straight line until it reaches a speed of 25 m/s. How much time elapses from start to stop
A propeller is modeled as five identical uniform rods extending radically from its axis. The length and mass of each rod are 0.859 m and 2.91 kg, respectively. What is its rotational kinetic energy
An electric field in some region goes as E=15x^2 i N/C. Determine the charge in potential as you move from the orgin to point (2,2,9) m
A figure skater glides along a circular path of radius 2.51 m. If she coasts around one half of the circle, find the magnitude of the displacement vector.
A teacher sits on a freely rotating stool holding two weights, each of mass 2.60 kg. When her arms are extended horizontally, find new angular speed of the teacher-stool-weight system
A stargazer has an astronomical telescope with an objective whose focal length is 185 cm and an eyepiece whose focal length is 1.20 cm. what is the best angular magnification the stargazer will be able to achieve
A 1.09-µF capacitor is charged by a 31.0-V power supply. The fully charged capacitor is then discharged through a 9.8-mH inductor. Find the maximum current in the resulting oscillations.
A 0.104 kg rock is attached to a 1.92 m long string and swung in a horizontal circle at a speed of 27.9 m/s. Find the tension in the string. Neglect the effect of gravity.
A waterfall is 87 meter high. If 20 percent of the gravitational potential energy of the water went into heating the water, find by how much would the temperature of the water
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