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At 230° C, the saturation pressure of ethane is 10.6 bar. Calculate the densities of the liquid and vapor phases using the Peng-Robinson equation. Compare to the reported values for the liquid and vapor densities of 0.468 and 0.0193 g/cm3.
1.0•kg block is tied to a string that is wrapped around the rim of a pulley of radius 10•cm. Find the speed of the block after it has fallen through a height of 0.48•m
The Moon rotates once on its axis in 27.3 days. Its radius is 1.74 x 10 to the 6th m. What is the linear speed of a rock on the Moon's equator due only to the Moon's rotation
the wire in the drawing carries a current of 9.3 a. suppose that a second long straight wire is placed right next to
A cube of copper with each edge having the dimension 12.7 mm, is put in a vise and squeezed by a force of 215 N exerted by either side of the vise. What is the stress in the copper cube
The image of a tree on a 35 mm color slide is 1.3 mm high. It is to be projected onto a screen 7 m from the slide, and is to appear 602 mm high. What focal length lens (in meters) is needed
A 1-m-tall barrel is closed on top except for a thin pipe extending 5 m up from the top. What is the pressure on the bottom when water is added to fill the pipe to its top
A stone is thrown with an initial speed of 12 m/s at an angle of 30 degrees above the horizontal from the top edge of a cliff. how far does the stone travel horizontally
A solid ball of mass 0.25 kg and radius 0.1 m rolls without slipping 4 m down an incline that makes an angle of 25 degrees with a horizontal. Find the angular acceleration of the ball
A yo-yo is made of two solid cylindrical disks, each of mass 0.051 and diameter 0.080 , joined by a (concentric) thin solid cylindrical hub of mass 0.0049 and diameter 0.012. What fraction of its kinetic energy is rotational
a car moving at 10.0 m/s encounters a bump that has a circular cross-section with radius of 30.0m, What is normal force exerted by the seat of the car
Light of the same wavelength passes through two diffraction gratings. One grating has 4000 lines/cm, and the other one has 6000 lines/cm. Which grating will spread the light through a larger angle in the first-order pattern?
After a animal or plant dies, its 14C content decreases with a half-life of 5730 y. estimate what is the age of the ancient site
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