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Two straight, parallel superconducting cables can withstand a maximum tension of 20 kN/m without breaking. An engineer wants to use these cables in a device in which each cable is securely fastened and carries 28 kA of electric current. The currents will be flowing in opposite directions. What is the minimum separation required to keep the cables from breaking?
the index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660. a beam of white
A dog chasing a ball starts at rest and accelerates uniformly over a distance of 5 meters. What is the dog's acceleration
A dentist uses a mirror to examine a tooth that is 1.25 cm in front of the mirror. The image of the tooth is formed 12.0 cm behind the mirror. Determine the mirror's radius of curvature
To start a jump this insect can accelerate at 4m/s^2 over a distance of 2.0mm. What is the upward velocity it takes off at
What is height of the cliff
A polonium nucleus, while at rest, decays into a lead nucleus of rest mass 342.1126 x 10^-27 kg, and emits a helium nucleus of rest mass 6.6483 x 10^-27 kg. Determine the rest mass of the Polonium nucleus
Light, which consists of linearly polarized and unpolarized components, is incident on a polarizing sheet.
A turntable with a moment of inertia of 4.8 kg · m2 rotates freely with an angular speed of 33 1/3 rpm. Calculate the angular speed of the turntable
A student has built a 20-cm-long pinhole camera for a science fair project. How far should she stand from the Washington Monument
What's your normal body temperature? It may not be 98.6°F, the oft-quoted average that was determined in the nineteenth century. What is the difference between these averages
A magnetic field has a magnitude of 1.20*10-3 T, and an electric field has a magnitude of5.60*103 N/C. Both fields point in the samedirection. A positive 1.8-µC charge moves at a speed of2.80*106 m/s in a direction that isperpendicular to both fields..
When a 9.29-kg mass is placed on top of a vertical spring, the spring compresses 4.11 cm. Find the force constant of the spring in kN/m
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