If any of your boating is also in brackish or salt water, fit aluminum anodes. Don Casey has been one of the most consulted experts on boat care and upgrades for 30 years, and a panelist on our Ask The Experts website for a decade.here the zinc is mounted directly to the protected metal--bolted to the side of a metal rudder, for example--it is essential to make sure the surface under the zinc is bare and bright before the anode is installed. This is to ensure good electrical contact.
A hydrophobic molecule is a molecule that won't combine with water. The word hydrophobic describes this water-repelling characteristic; hydro means water in Greek, and phobic derives from phobos, which means fearing.. Though these molecules don't literally fear water, they do not mix with water molecules.
A...is held together by covalent bonds. water molecule: An example of a molecule held together by covalent bonds is ... . water: What does it mean to say a water molecule is âpolarâ? Draw a diagram of water to show the answer: Polar molecules have a positive region â in water it is the two hydrogen atoms. If the atoms in a water molecule are held together by covalent bonds, what type of bond holds multiple molecules together? Hydrogen bonds: How are hydrogen bonds and cohesion related? Hydrogen bonds keep water molecules packed tightly together. Cohesion is when two molecules of the same substance are attracted to each other and they stick together. What causes surface tension? Cohesion â the attraction of water molecules to each other. What is the opposite of cohesion?