2006-11-14 22:11:10 · 3 answers · asked by ali k 1 in Science & Mathematics ➔ Earth Sciences & Geology
rain water is mildly acidic (carbonic acid) and so will dissolve minerals found in rock. For example, if you look at an old building made from limestone the corners will be slightly round and the surface will be pitted. This is because limestone is made from calcium carbonate which is easily dissolved by acids.
This is also the same effect which produces limstone caves and why the surface of rocks appear discoloured and weathered.
2006-11-15 01:25:34 · answer #1 · answered by andrew w 3 · 0⤊ 0⤋
The freeze-out plug is genuinely a casting hollow interior the block or the top that's coated by potential of a skinny steel plug after the casting. at the back of those are the water jackets which permit coolant/antifreeze to bypass during the block & head. The plugs can the two rust, or crack, even blow out if there's a freezing issue interior the motor, or only from age. probability is, you're watching a headache right here. certainly, i will virtually assure it. permit the owner replace it and then call you for an prolonged attempt holiday which might comprise a supply up by potential of your community mechanic for some suggestion. I doubt that automobile will ever see the line lower back. only my opinion right here.
2016-12-10 09:31:21 · answer #2 · answered by fette 4 · 0⤊ 0⤋
Most "stones" are composed of minerals that have ionic bonds. Water is a polar-covalent molecule, hence its negative side attracts the positive side of minerals and its positive side attracts the negative side of minerals. As ions are removed from minerals they are surrounded by the appropriate side of water molecules. It can be thought of as 'minerals dissolving in water'.
2006-11-15 09:59:55 · answer #3 · answered by Amphibolite 7 · 0⤊ 0⤋