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A man stands on a frictionless platform rotating with an initial angular velocity 4.0 rev/min. His arms are out and his rotational inertia is 5.00kg*m2. He pulls in his arms reducing hos rotational inertia to 3.00kg*m^2
a) what is the initial angular velocity in rad/s?
b) what is his initial angular momentum?
c) what is his final angular momentum?
d) what is his initial rotational kinetic energy?
e) what is his final angular velocity in rad/s?
f) what is his final rotational kinetic energy?
A 0.25 kg harmonic oscillator has a total oscillation energy of 9.9 J. If the oscillation amplitude is 20.0 cm, what is the oscillation frequency
A starship blasts past the earth at 2.0\times 10^8\;{\rm{ {\rm m}/{\rm s}}}. With what speed does the laser beam approach the earth
A 53 kg springboard diver leaps from a 2m high board by bouncing until she has increased the energy in the board to 1040 joules. What is the maximum height above the water of the diver during her dive
A boy stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.69 of the boy's regular weight. Compute the acceleration of the elevator
A converging lens (f = 10.8 cm) is located 32.9 cm to the left of a diverging lens (f = -6.06 cm). Locate the final image of the stamp relative to the diverging lens
cWe are depositing NiCr fim on a Si wafer for a MEMS device. We measure a stress of the film of 600 MPa using X-Ray diffraction. The film was deposited at 80 C. If there is no externally applied stress ( eg. Deformation), (a)What would the intrinsic ..
Point charges of -8.20 micro Coulombs are placed at each corner of a square that is 0.250m on a side. Find the electric potential at the center of a square
2 long parallel wires carry currents 20 A and 5 A in opposite directions the wires are separted by 20 cm what is the magnetic field between the two wires
A moon orbits a planet of unknown mass with a period of 1.8 days. If the radius of the moon's orbit is 420,000,000 meters, find the mass of the planet
Two packages at UPS start sliding down a ramp 40 degrees from the horizontal, Package A is sliding down in front of Package B. Package A has a mass of 3.50 and a coefficient of kinetic friction of 0.220. Package B has a mass of 8.00 and a coefficient..
An aluninum wire has a length of 8 m and a cross-sectional radius of 0.004 m. Calculate the weight of a hanging object
A Young's double slit apparatus is set up where the source wavelength is 500 nm and the double slit spacing is .04mm. At what distance from the double slit must the screen be placed if the spacing among adjacent bright fringes is to be 2.7 cm?
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