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A rail gun accelerates a projectile from rest by using the magnetic force on a current-carrying wire. The wire has radius r = 4.3 10-4 m and is made of copper having a density of ? = 8960 kg/m3. The gun consists of rails of length L = 1.0 m in a constant magnetic field of magnitude B = 1.8 T, oriented perpendicular to the plane defined by the rails. The wire forms an electrical connection across the rails at one end of the rails. When triggered, a current of 1.10 104 A flows through the wire, which accelerates the wire along the rails. Calculate the final speed of the wire as it leaves the rails. (Neglect friction.) 1
During a portion of the Carnot cycle, a dilute gas of diatomic nitrogen is compressed slowly at constant temperature, T = 280 K. How much energy was transferred to the environment through heating or cooling
Two identical closely spaced circular disks form a parallel-plate capacitor. What are the diameters of the disks
If both the ring and the rod are warmed together, what temperature must they both reach so that the ring barely slips over the rod.
A hypothetical 40cm long arm is assumed to be weightless. What is the maximum weight that can be held in the hand if the muscle is attached 1 cm from the below
A skater of mass 74.5 kg initially moves in a straight line at a speed of 4.80 m/s. what is the skater's final velocity
A simple pendulum has a mass of 0.350 kg and a length of 7.00 m. It is displaced through an angle of 12.0° and then released, What is the maximum angular acceleration
Two organ pipes, open at one end but closed at the other, are each 1.27m long. One is now lengthened by 2.00cm. Find the frequency of the beat they produce when playing together in their fundamental.
A 16.0-? resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 170-V generator. At what frequency is the current a maximum
A point charge of 6.1 µC is at the center of a cubical Gaussian surface 60 cm on an edge. What is the net electric flux through the surface
during a racing event a 110 kg car accelerates from 0 to 29 m/s in 4.3 seconds. what is the net force exerted on the car
a bug sits on the edge of a spinning wheel of radius .2m which is rotating counter clockwise at a rate of 6 rad/sec and slowing down at a rate of 4 rad/s^2. what is the magnitude of the tangential acceleration
q. a hot wheels track has a spring loaded launcher. a 100g car is pushed into the launcher which compresses the spring
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