Various species of hagfish, or slime eels, live on the ocean floor, where they burrow inside other fish, eating them from the inside out and secreting copious amounts of slime. Their skins are widely used to make eelskin wallets and accessories. Suppose a hagfish is caught in a trap at a depth of 200 m below the ocean surface, where the water temperature is 10°C, then brought to the surface where the temperature is 15°C. If the isothermal compressibility and volume expansivity are assumed constant and equal to the values for water, 
what is the fractional change in the volume of the hagfish when it is brought to the surface? Table 3.2 provides the specific volume, isothermal compressibility, and volume
expansivity of several liquids at 20°C and 1 bar25 for use in Problems 3.13 to 3.15, where ? and ? may be assumed constant.
What will be an ideal response?
If the isothermal compressibility and volume expansivity are taken to be constant, then we can integrate
From the initial state to the final state, to get
The change in temperature is 5ºC = 5 K. The pressure changes with height in a column (or ocean) of fluid as ?P = ?gh. So, if we take the density of water to be 1000 kg/m3 (actually, for sea water it is more like 1030), and g = 9.8 m/s2, and h = -200 m (the fish ends up at the surface, where the pressure is lower), then ?P = 1000*9.8*-200 = -2×106 Pa = -20 bar (about 20 atmopheres, or 300 psi). Thus, we have
Thus, V/Vo = 1.0015. The hagfish expands by about 0.15%.
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Indicate whether the statement is true or false
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Indicate whether the statement is true or false
Energy in motion is kinetic energy. What term refers to stored energy?
What will be an ideal response?