The nail is harder than the wooden ruler, causing the nail to leave scratches on the ruler's surface when it is dragged across it. Wood is a relatively soft material compared to metal, so it is easily marked by harder objects like a nail.
Because iron is rusting.
A mineral's hardness can be determined using a fingernail, penny, or nail by testing its ability to scratch or be scratched by these objects. The Mohs scale of hardness ranks minerals from 1 (talc) to 10 (diamond), with a fingernail typically rated at 2.5, a penny at about 3.5, and a nail around 5.5. By attempting to scratch the mineral with these items, you can estimate its hardness based on which objects can scratch it and which cannot.
Granite is a hard and durable natural stone, so it is unlikely to be scratched by a fingernail. Fingernails are generally not hard enough to scratch granite surfaces.
a nail is sharp because the sharper the nail is, the thinner the tip is, which in turn can more easily get in between the molecules of the wood, so you can then push/smash your way into the wood, and as the width of the nail gets wider, it pushes apart the molecules, in turn, clearing the path for the nail to get through. PS. this is just common sense.
It can be scratched by a diamond, corundum, topaz, and quartz.
The duration of nail scratches on different surfaces can vary depending on the material. On softer surfaces like wood or plastic, nail scratches may last longer compared to harder surfaces like metal or glass. Generally, nail scratches can be visible for a few days to a few weeks, depending on the depth and severity of the scratch.
a buffer In most cases if you can feel the scratch with your finger nail, it's to deep to buff out.
The case for a HTC phone is suppose to keep the phone from being scratched. Scratches on a case is just from normal wear and tear. Clear nail polish or a \"buffing\" nail file should work in dulling a scratch.
Yes it can. It is one of the most painfull stings that you can get and leaves scratches in a pattern like nail scratches.
Yes, nail scratches have the potential to leave scars on the skin.
Yes: not a good use for a diamond, but yes, a diamond will scratch a nail.
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
The mineral would have a hardness between 5.5 and 6.5 on the Mohs scale. It cannot scratch glass (hardness of about 5.5) but can scratch an iron nail (hardness of about 4). This places it in the range of minerals like orthoclase feldspar or apatite.
Nail marks would leave scratches on the face. These will need to heal and will go away on their own. If the scratches are deep enough, they may scar.
The wooden stool is heavier than the iron nail
no
i think so