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A motor has an armature resistance of 2.5 Ohms. If it draws 10 A when running at full speed and connected to a 100 V line, how large is the back emf?
A parallel-plate capacitor consists of plates of area 1.5 x10^-4 m2 and separated by 1.0 mm. What is the charge on the plates
A pigeon flying horizontally at a speed of 16.0m/s drops a stolen Rolex watch. The timepiece falls to the ground in 2.90s. (a) what was the watch's altitude when it was dropped? (b) how far horizontally did it travel before it smashed into the deck?
Petrus takes a cold glass of cola from fridge. He puts 3 cubes of ice into it. He laeves the glass on a table in a warm room for 5 minutes. He notices that the ice cubes have become smaller. The outside of the glass is now wet. What is the reason ..
A certain lightbulb filament when hot has a resistance of205 Ω. The potential difference across the filament at acertain instant is standard household voltage, 120 V.
What's the quickest way to approach this problem? A car is traveling at 80 km/h along the highway. A second car is located 1 km behind, but traveling at 100 km/h. How long does it take for the second car to pass the first?
A 2inx4inx8ft is leaning against the wall, draw afree-body diagram of forces on it. what would be the minimum angle of the wooden bar with the floor
your friend who works for the college radio station must make electric-field measurements for a report to be filed with
The resistance of a very fine aluminum wire with a 20.0um* 20.0um square cross section is 1000 ohms. How many turns of wire are needed
A circuit containing a 3.9H inductor has an alternating current applied to it. If Irms is 4.4 A and Vp is 45V, find the frequency of the signal
Two particles collide and stick together to form anew particle. First particle has a rest energy Eo and a kinetic energy 2Eo. Second particle is stationary and has a rest energy=2Eo. The question is: what is therest energy and the speed of the new..
A 500 gram dynamics cart starts at rest and rolls down a track thatis 2.5 meters long and elevated 15 cm on one end. At thebottom of the track it rolls onto a level surface and then collideswith a 1200 g cart that is sitting still. The collision i..
an electric field of intensity 3.10 knc is applied along the x-axis. calculate the electric flux through a rectangular
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