Describe how the density of an object less dense than water can be determined using Archimedes' principle. How about the density of a liquid? A ball has a density of 900 kg/m^3 and its volume is 0.03 m^3. To submerge in ...
Some fish have a density slightly less than that of water and must exert a force (swim) to stay submerged. What force must an 85.0-kg grouper exert to stay submerged in saltwater if its body density i A block of wood weighs 40 \ N in air and 30 \ N in water. What is the buoyan...
Lymphocystis is an infectious disease of cultured and wild, freshwater and saltwater teleosts that affects a remarkably wide variety of fish from more than 30 different families (Lawler et al., 1977; Noga, 2010). The disease is one of evolutionarily advanced teleosts to date, not having been...
Saltwater Toxicity Tests B.Anderson,B.Phillips, inMarine Ecotoxicology, 2016 6.3.2Mollusks Embryo-larval development tests using gastropod and bivalve mollusks have been used in water and sediment quality assessments for decades. These tests are particularly useful for toxicity monitoring purposes...
So the water goes directly into their bodies through their gills(鱼鳃). These fish don’t really have to drink water through their mouths like we do.Saltwater fish, on the other hand, have less salt in their bodies than the sea water does. They often drink a lot of sea water. If we...
More than 70 percent of our planet’s surface is covered in ocean, and every drop of ocean water is undrinkable—but it doesn’t have to be. In dry places like Texas, distillation facilities can heat saltwater and capture the vapors for drinking. Upon the opening of a distillation plant ...
The water becomes even more dense by cooling in winter. Each of the two forces a deep convection by turning the water masses 'upside down'. The circulation reaches the deep basins. This is prevented by the lighter, less saline water covering the surface in the Black Sea. It functions like...
Saltwater Martin Joergensen The humble roach Henning Eskol This particular fishing trip was ignited by a photo. Or actually by a handful of photos. Shot by my fishing friend Lars who had been walking along a coast where we fish quite often. You can walk along the bank on a beautiful cliff...
However, only a few strains of microalgae are actually exploited on an industrial scale (less than a dozen, including those used as feed in aquaculture). Consequently, microalgae-derived products are currently limited to a few niche markets; however, these organisms can be a valuable source of ...