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Two point masses, each of mass 5 kilogram are joined by a light straight rod of length 1 meter. This "dumbbell" is located on a horizontal frictionless surface, and set into rotation, about a vertical axis through the center of mass, with an angular speed of 4 rad/s. Suddenly, the rod twice in length.
1. Find the initial moment of inertia of the system?
2. Find the initial angular momentum of the system?
3. Find the initial kinetic energy of the system?
4. Find the final angular velocity of the system?
5. Find the final kinetic energy of the system?
A pilot flies her route in two straight-line segments. The displacement vector A for the first segment has a magnitude of 242 km, find the directional angle
a sample containing 3.00 mol of an ideal gas at 25c is expanded isothermally and reversibly from an initial volume if
A small conducting spherical shell with inner radius a and outer radius b is concentric with a larger conducting spherical shell with inner radius c and outer radius d. The inner shell has the total charge of -1q and outer shell has a total charge..
A skateboarder shoots off a ramp with a velocity of 5.7 m/s, directed at an angle of 52° above the horizontal. The end of the ramp is 1.4 m above the ground. how far is this point horizontally from the end of the ramp
A plane sinusoidal electromagnetic wave in air has a wavelength of 3.90cm and an E field amplitude of 1.40V/m. What is the magnetic field amplitude?
you are on a treasure hunt and your map says walk due west for 52 paces then walk 34.8deg north of west for 41 paces
What are vertical and horizontal components of the ball's momentum immediately after striking the crossbar. what is an average acceleration of the ball during this time interval.
A concave mirror has a focal length of 25.8 cm. The distance between an object and its image is 51.4 cm. Find (a) the object and (b) image distances, assuming that the object lies beyond the center of curvature and (c) the object and (d) image distan..
Three balls with masses of 3.0 kg, 1.0 kg, and 5.0 kg are located at coordinates (8.0m,8.5m), (8.5m,4.5m), and (4.5m,1.0m), What is the x-coordinate of the center of mass
A woman with a mass of 55.0kg is standing on the rim of a large disk that is rotating at an angular velocity of 0.470rev/s, Calculate the magnitude of the total angular momentum of the woman-plus-disk system
A proton is (approximately) a spherically symmetrical ball of charge of radius 1 x 10-15 m. what is the magnitude of the repulsive electric force
Suppose you have a tube 1.20 m long, open on both ends. Determine the frequency of the 2nd overtone, assuming the speed of sound to be 343 m/s. Repeat for the same length tube but with a closed end.
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