I don't know about rusting steel nails, but in any experiment, the control is an experimental subject that is exposed to all of the same conditions as the main subject except for the one thing that you think will matter.
For example, lets say, you like to make pancakes, and one day you change up your recipie by adding a pinch of salt. The pancakes taste better. Was it the salt? The way to find out is to do an experiment: Make two batches, one with salt, and one without. Try to keep everything else about the two batches as much alike as possible. Mix them up at the same time (or as close as possible). Scoop the flour from the same bin with the same scoop. Get the milk from the same carton. Don't let the batter for one batch sit any longer than the other. Cook them on the same griddle at the same temperature. The batch without the pinch of salt is your control batch.
Do the experiment several times. If the batch with the salt is consistently better than the control batch, then you can reasonably conclude that it was the salt that made your pancakes better (i.e., your hypothesis was valid), but if the salt batch is notconsistently better than the control batch, then you'll probably want to go back and think about what else might have been different on that day when you first changed the recipie, because it probably wasn't the salt.
dependent (thing you change) = nail polish
indipendant (thing that change because of what you change)= hardness
The variable in aforementioned question is the protection, or lack of protection the nail is given.
You don't want stuff falling off your roof, so you don't want the nails to rust. Zinc, unlike other metals, will not rust, so you wrap the nail with a coat of zinc to prevent rusting.
Yes, rusting nails is a chemical reaction. I just went over this in chemistry class last week.
Usually zinc because itis low cost, easy to cover the iron with, and prevents rusting
Watching Paint Dry or Nails RustApple Oxidation Simulating Rusting NailsWhat is in your Soda Pop?What does Zinc Coating do for a nail?What is Galvanization?Price vs Longevity Tradeoff
Over time the coffee gets stuck in the nails and after all the warm, moist air comes to up to make the coffee, it then causes rusting.
The nails should be covered by the shingles or caulk. They should not be rusting.
7.What effect does water pH have on the rusting of nails?
If you're speaking about nails as in "hammer & nails" then the effect of water and oxygen will eventually corrode them by rusting.
The fat present in milk becomes deposited on nails and it is water repellent.
Common (uncoated) finishing nails would work.
If they are Iron Nails it is:FeH + O2 --> CO2 + H2OThis is Unbalanced
Rusting of iron needs the presence of water.
Because they are protected from rusting. -Buying galvanised nails is much better.
The most important solution is to use greases.
Rusting of iron is chemical. It is the combination of oxygen with the iron, creating a different chemical: rust or iron oxide.
Normally nails aren't made of an alloy however they are galvanized, this means they have a coating of a less reactive metal such as Zinc as to prevent rusting of the nails. Nails are normally made out of iron.
Keep the nail in a glass of Coca-Cola for two weeks.