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Two identical wires with a weight of 4.95E+4 N/m, are located one above the other, in a vertical plane above the surface of the earth. The wires are aligned north-south so that the earths's magnetic field will not affect them. Assume the distance of separation is 0.07 m and that they will carry the same current, but in opposite directions. What must be the value of the current for the lower wire to levitate the upper wire?
Someday in the future, an astronaut on Mars (where gMars = 3.71 m/s^2) might lean over the edge of 25.0-meter-tall spacecraft , What will be the package's speed when it strikes the ground
A 20 kg projectile is fired at an angle of 600 to the horizontal with an initial velocity of 1.6 x 102 m/s. What is the straight line displacement between the two fragments after they land
Calculate the activity of Uranium-238 in 100 grams of uranium ore containing 5 weight percent U308. What is the expected activity of Uranium-234 in the ore
A 98.0 cm pendulum is released from a small angle. After 124 oscillations the amplitude is one half of its original value. The damping is proportional to the speed of the pendulum bob. Find the value of the damping coefficient, ?, (in Hz).
Two identical cars (m = 1350 kg) are traveling at the same speed of 18.9 m/s. What is the magnitude of the total momentum of the two cars
A rotating space station is said to create "artificial gravity"-a loosely-defined term used for an acceleration that would be crudely similar to gravity, what angular velocity would produce an "artificial gravity" of 9.80 m/s2 at the rim
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +8q. Sphere B carries a charge of -q. Sphere C carries no net charge. Spheres A and B are touched together and then separated.
1 why does the stroboscope appear to make the vibrations stop at certain frequencies? why does it appear to be two
a hollow cubical box is 0.30m on an edge. This box is floatingin a lake with one-third of its height beneath the surface. What is the depth of the water in the box
A cart of mass 360 g is placed on a frictionless horizontal air track. A spring having a spring constant of 9.0 N/m is attached between the cart and the left end of the track.
An inflated basketball has a gauge pressure of 9.0lb/in2. What is the actual pressure inside the ball
An object that is 37 cm in front of a convex mirror has an imagelocated 25 cm behind the mirror. How far behind the mirror is the image located when the object is 30 cm in front of the mirror?
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