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By holding a bike wheel (mass m, radius r, so that it rotates freely about its vertical center axis) and standing on a circular platform (a disk of mass M and radius R, free to rotate about its vertical center axis), describe a method to measure your mass using a stopwatch (an interesting balance!). Explain your method using physics equations and manipulations to prove that your method will work.
An electric field of 7.85 10^5 V/m is desired between two parallel plates, each of area 42.0 cm2 and separated by 2.45 mm of air. What charge must be on each plate.
Huygens' principle (first described by the Dutch scientist Christiaan Huygens in 1678) uses geometry to determine the shape of a wavefront at a time.
On a spacecraft two engines fire for a time of 479 s. One gives the craft an acceleration in the x direction of ax = 4.99 m/s2, Find the magnitude of the initial velocity
Two 10 meter parallel wires located at a distance 0.4 meter and carrying equal currents attract each other with a force of 2mN. Obtain the magnitude and direction of the current
"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. Find the work done by the force generated by the propulsion unit
Suppose two parallel conducting plates are separated by 0.45 cm of air. Find the maximum potential difference between the two parallel conducting plates in kV
A positivly charged rod is brought near them.Then, one of the two shpheres is displaced momentarily so that thetwo spheres touch briefly. After this, one shphere is found to havea net charge of 2.9nC. What is the charge in the second sphere? (Itwi..
Consider a hypothetical planet in our solar system whose average distance from the Sun is about four times that of Earth. Decide the orbital period for this hypothetical planet.
a jogger maintains a speed of 3.2 ms for 216 m until he encounters a stoplight and he abruptly stops and waits 29 s for
A merry-go-round is spinning and has a period of 7.25 s. A boy jumps off in a direction parallel to the radius and, by so doing, changes the moment of inertia of the merry-go-round from 575 kg·m2to 545 kg·m2. By conservation of angular momentum, appr..
If a technician strikes this blade with a mallet 1.15m from the center with a 40.0N force perpendicular to the blade, find the maximum angular acceleration the blade could achieve
A local FM radio station broadcasts at a frequency of 99.0 MHz. What is the wavelength, in meters, of the electromagnetic waves produced?
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