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A current of 4 A flows in a copper wire 8 mm in diameter. The density of valence electrons in copper is roughly 9 × 1028 m?3. Find the drift speed of these electrons. Answer in units of m/s.
A typical AAA battery has stored energy of about 3400 J. (Battery capacity is typically listed as 625 mA h, meaning that much charge can be delivered at approximately 1.5 V.) , what must the area of each plate be
A 120. mH inductor is in series with a 20. O resistor and a variable capacitor (0.110 µF to 0.400 µF). what current flows at resonance
A particle has an acceleration of 6.19 m/s^2 for 0.350 s . At the end of this time the particle's velocity is 9.26 m/s What was the particle's initial velocity?
A pipe open only at one end has a fundamental frequency of 214 Hz. A second pipe, initially identical to first pipe, is shortened by cutting off the portion of the open end. Now, as both pipes vibrate at their fundamental frequencies, the beat freque..
A 2.0 m conductor is formed into a square and placed in the horizontal xy-plane. What is the magnetic flux through the conductor
A 1900-kg car hits a parked 2200-kg car at 32 m/s and sticks to it. What is the velocity of the two cars after the collision
q1. a 0.440-kg blue bead slides on a frictionless curved wire starting from rest at point where h 1.40 m. at point the
you are outside tossing a football with your friends. you throw the football at an angle of 52.3deg above the
The current density from the axis in the wire of radius R is given by J = cr^0.5 (r is powered to one-half), Draw the current density as a function of r graph
Block A of mass 3 kg slides into block B of mass 2 kg. Before collision, block A moves to the right with speed 10 m/s and block B is stationary, what is the kinetic energy change for the system
You want to take a full-length photo of your friend who is 1.80{\rm m} tall, using a 35.0{\rm mm} camera having a 50.0{\rm mm} lens. How far is the lens from the film
A bathysphere used for deep-sea exploration has a radius of 1.50 m and a mass of 1.19 104 kg. In order to dive, this submarine takes on mass in the form of sea water.
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