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A ballet student with her arms and a leg extended spins with an initial rotational speed of 1.1 rev/s . As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg.m2 and her rotational velocity is 4.2 rev/s. Determine her initial rotational inertia.
a particle of mass m moves in the region xgt0 under a force f -kxcx where k and c are positive constants. find the
Water is pumped into a storage tank from a well delivering 17 gallons of water in 33 seconds throughout a pipe of 1.0 in 0.2 cross-sectional area. What is the average velocity of the water in the pipe as the water is pumped from the well?
The record for the highest speed achieved in a laboratory for a uniformly rotating object was 2.01e3m/s for a 0.15m long carbon rod
Determine the speed of a 1.00 x 106 kilogram particle of dust that has the same momentum as a proton moving at 0.999c
The leg and cast weigh 220 N. find out the weight and the angle needed so that no force is exerted on the hip joint by the leg plus the cast.
Suppose a heat engine has an efficiency of 0.248 and produces 1.88×10^4 J of work. How much energy is pulled in from the hot reservoir
If the down going elevator comes to rest with a constant deceleration over a distance of 4.2 m, what is the magnitude of the force the elevator floor exerts on the man
Adjacent antinodes of a standing wave on a string are 20.0 cm apart. How far apart are the adjacent nodes
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 33.5 m/s. It then flies a further distance of 46.9 km and its velocity is 43.1 m/s. Find the airplane's acceleration and calculate how much t..
Early underwater exploration was conducted with a diving bell. Acylindrical diving bell 3.0 m in diameter and 4.0 m tall with thebottom open is submerged to a depth of 220 m in the ocean. How high does the sea water rise in the bellat this depth
four charges are placed at the corners of a square of side 4 cm. What is the electrostatic potential energy of this system relative to infinity
Light with an initial intensity of S0 passes through a vertical-oriented polarizer, and then passes through a second polarizer oriented 12.2° from vertical. find the direction (or possible directions) of the initial polarization
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