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In April 2010, the worst oil spill until that time occurred when an explosion and fire on the Deepwater Horizon left 11 workers dead and began releasing oil into the Gulf of Mexico. One of the attempts to contain the spill involved pumping drilling mud into the well to balance the pressure of escaping oil against a column of fluid (drilling mud) having a density significantly higher than that of seawater and oil. For purposes of the following problems, you may assume seawater has a specific gravity of 1.03 and that the well head was 5053 ft below the surface of the Gulf.
(a) Estimate the gauge pressure (psig) in the Gulf at a depth of 5053 ft.
(b) Subsequent data indicate that the pressure inside the wellhead (defined here as being on the floor of the Gulf), was approximately 4400 psig. Suppose a drilling mud fills a pipe connecting the surface of the Gulf to the wellhead and balances that pressure. Estimate the specific gravity of the drilling mud.
(c) The drilling mud is a stable slurry of sea water and barite. What is the weight fraction of barite in the slurry?
(d) What would you expect to happen if the barite weight fraction was significantly less than that estimated in Part (c)?
A monoenergetic beam of electrons is incident on a single slit of width 0.95 nm. A diffraction pattern is formed on a screen 24 cm from the slit. what is the energy of the incident electrons
If the rms speed of the molecules of a quantity of helium at temperature 142 K is the same as the rms speed of neon atoms at a second temperature
A photon has the same momentum as an electron moving with a speed of 1.83×105 m/s. What is the wavelength of the photon
A cylindrical tank 3.0m deep is full to the brim with water. Sunlight first hits part of the tank bottom, Find the tank's diameter.
If the translation rms speed of the water vapor molecules in air is 703 m/s, what is the translational rms speed of the carbon dioxide molecules in the same air? Both gases are at the same temperature.
A brick is released with no initial speed from the roof of a building and strikes the ground in 2.70 {rm s}, encountering no appreciable air drag. How tall is building? How fast is the brick moving just before it reaches the ground.
A worker drops a wrench from the top of a tower 88.00 m tall. With what velocity does the wrench strike the ground? (Suppose the positive direction is upward.)
A solid has a volume of 8cm3. When weighed on a spring scale calibrated in grams, the scale indicates 20g. What does the scale indicate if the object is weighed as immersed in a liquid of density 2g/cm3.
The average distance from the earth to the sun is called the astronomical unit (AU). does it obey Kepler's third law
220 cm3 of hot tea at 89°C are poured into a very thin paper cup with 70 g of crushed ice at 0°C. Calculate the final temperature of the "ice tea"
A concrete highway is built of slabs 14m long (20 degrees Celsius). How wide should the expansion cracks between the slabs be
When she gets off the ride, she uploads the scale readings to a computer and creates a graph of scale reading versus time. Note that graph has a minimum value of 519 rm N and a maximum value of 666 rm N.
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