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A cockroach of mass m lies on the rim of a uniform disk of mass 7.00 m that can rotate freely about its center like a merry-go-round. Initially the cockroach and disk rotate together with an angular velocity of 0.260 rad/s. Then the cockroach walks half way to the center of the disk. What then is the angular velocity of the cockroach-disk system?
a helicopter is lifting two crates simultaneously. one crate with a mass of 148 kg is attached to the helicopter by
A glass sheet is covered by a very thin opaque coating. In the middle of this sheet there is a thin scratch 1.25×10-3mm thick. The sheet is totally immersed beneath the surface of a liquid.
A 3.6- cm-radius ball rolls down an inclined plane from rest at the top. The angular acceleration of the rolling ball about its center is 150 rad/s2, How long is the plane
Show that the force between parallel wires carrying currents I1 and I2, both in the same direction, find the magnetic force on segment dI2 of wire 2.
What mass of water (at 4.0 C) can be contained in a rectangular box whose dimensions are 10 cm by 5.00 cm by 1.00 cm? The density of water at 4C is 1.000 X 10 kg/m-cubed.
Rope BCA passes through a pulley at point C and supports a crate at point A. Rope segment CD supports the pulley, What is the angle required for equilibrium?
In a diffraction experiment a point (pinhole) source of wavelength 600 nm is to be used. Determine whether Fresnel or Fraunhofer diffraction applies
On a cold day, 25000 J of heat leaks out of a house. The inside temperature is 22 °C, What is the increase in the entropy of the universe that this heat loss produces
Your physics TA has a far point of 0.711 m from her eyes and is able to see distant objects in focus when wearing glasses with a refractive power of ?1.47 D. Determine the distance between her glasses and eyes
If a cube of a certain metal increases its volume from 15 cm3 to 17 cm3 as the temperature increases from 12°C to 28°C
two blocks connected by a light cord over a pulley. This apparatus is known as an Atwood's machine. what is the speed of the lighter block
A small turtle moves at a speed of 165 furlongs per fortnight. Find out the speed of the turtle in centimeters per second. Note that 1 furlong = 220 yards and 1 fortnight = 14 days.
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