Review. A solid sphere of brass (bulk modulus of ) with a diameter of is thrown into the ocean. By how much does the diameter of the sphere decrease as it sinks to a depth of ?
The decrease in diameter is .
The magnetic field,
The depth of ocean,
The diameter of sphere,
The radius is,
The pressure in a fluid is the force per unit area exerted by the fluid on a surface:
In the SI system, pressure has units of Newton’s per square meter , and .
Bulk modulus is given by,
Applying the formula of Bulk modulus here, you get
While pressure is,
Combining both, you get
Therefore decrease in diameter is,
Hence, the decrease in diameter is .
On October 21, 2001, Ian Ash pole of the United Kingdom achieved a record altitude of powered by toy balloons filled with helium. Each filled balloon had a radius of about and an estimated mass of . (a) Estimate the total buoyant force on the balloons. (b) Estimate the net upward force on all balloons. (c) Ash pole parachuted to the Earth after the balloons began to burst at the high altitude and the buoyant force decreased. Why did the balloons burst?
Calculate the absolute pressure at the bottom of a freshwater lake at a point whose depth is . Assume the density of the water is and that the air above is at a pressure of . (b) What force is exerted by the water on the window of an underwater vehicle at this depth if the window is circular and has a diameter of ?
Question: One of the predicted problems due to global warming is that ice in the polar ice caps will melt and raise sea levels everywhere in the world. Is that more of a worry for ice (a) At the North Pole, where most of the ice floats on water (b) At the South Pole, where most of the ice sits on land; (c) Both at the north and south pole equally; or (d) At neither pole?
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