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A solid disk rotates in the horizontal plane at an angular velocity of 0.049 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.20 kg.m2. From above, sand is dropped straight down onto this rotating disk, so that a thin uniform ring of sand is formed at a distance of 0.40 m from the axis. The sand in the ring has a mass of 0.50 kg. After all the sand is in place, what is the angular velocity of the disk?
The brakes are applied to a car traveling on a dry, level highway. A typical value for the magnitude of the car's acceleration is 5.45 m/s2. If the car's initial speed is 33 m/s, how long does it takes to stop and how far does it travel, starting ..
A gas is allowed to expand isothermally until it reaches its final volume and its pressure is 2.97 atm. Find the heat absorbed by the gas during this process
You are at a rock concert, and the sound intensity reaches levels as high as 100 dB. Calculate the amplitude of this oscillating force
A +5.8 µC charge is placed at the origin and a -3.9 µC charge is placed at x = 25 cm. At what coordinates can a third charge be placed
What is the wavelength of radio waves. An electron in a TV is accelerated toward the screen across a potential difference of 54.2kV. How much kinetic energy does the electron gain while accelerating.
what is the max number of steps any worker should be allowed.
Find the resulting angular speed of the disk (in rad/s) and describe the direction of rotation.
The traces of the rain on the side windows of the car make an angle of 60.0 with the vertical. Find out the velocity of the rain with respect to the following reference frames.
A bowling ball is rolled off a flat top building w/ an initial speed of 5.8m/s. It lands 24.2 meters from base of the building. how tall is the building
The wavelength of the laser beam used in a compact disc player is 549 nm. Estimate the spacing between the slits of the grating
A test rocket is fired straight up from rest with a net acceleration of 20 m/s2. What maximum elevation does the rocket reach
A 0.500m -diameter vat of liquid is 2.20m deep. The pressure at the bottom of the vat is 1.30atm. What is the mass of the liquid in the vat
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