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A current of 0.97A flows through a copper wire 0.50mm in diameter when it is connected to a potential difference of 15 V. How long is the wire? Answer must be in km.
A loop of width 0.2m and length 0.8m, and resistance 200ohms is pulled through a magnetic field of 0.4 T at 0.2 m/sec. What is force necessary to pull the loop
Suppose that the dipole moment associated with an iron atom of an iron bar is 2.4 x 10-23 J/T. What is the dipole moment of the bar
A solid, horizontal cylinder of mass 8.0 kg and radius 1.30 m rotates with an angular speed of 7.50 rad/s about a fixed vertical axis through its center. Determine the final angular speed of the system
X rays diffract from a crystal in which the spacing between atomic planes is 0.179nm. What is the angle of the first-order diffraction
A bird stands on a dc electric transmission line carrying 3300A (Figure 1) . The line has 2.7×10?5? resistance per meter, and the bird's feet are 3.5cm apart
A person, sitting on a stool rotating at a rate of 21 rpm, holds masses in each hand. When their arms are outstretched , the total rotational inertia of the system is 3.7 kg·m2. what is the new angular velocity of the system
The hydrogen alpha has a 658.28 nanometer wavelength. What is the shifted wavelenght of the Hydrogen alpha light emitted by stars in the Andromeda as viewd from Earth
A bird watcher meanders through the woods, walking 1.78 km due east, 1.03 km due south, obtain the magnitudes of the bird watchers displacement
A 0.1 Kg hockey puck slows down from 45 m/s to 44 m/s due to friction as it slides 25m across the ice. a) Draw a free body diagram showing all the forces on the puck b)using the work-energy relationship, find the work done by the frictional force.
The uniform solid block in the figure has mass 38.3 kg and edge lengths a = 0.622 m, b = 1.41 m, and c = 0.0740 m. Calculate its rotational inertia about an axis
In Fig. 15-53, three 18000 kg ore cars are held at rest on amine railway using a cable that is parallel to the rails, which areinclined at angle θ = 34°. The cable stretches 21 cm justbefore the coupling between the two lower cars breaks, detachin..
In a Compton scattering experiment, an x-ray photon scatters through an angle of 21.0° from a free electron that is initially at rest. The electron recoils with a speed of 2,520 km/s.
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