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Why is erasing a pencil mark a physical or chemical change?
PHYSICAL
How many atoms of carbon graphite in pencil mark?
A pencil mark primarily consists of graphite, which is made up of carbon atoms. In a typical pencil mark, there are approximately 10^19 to 10^20 carbon atoms in a single mark, depending on its size and thickness. This vast number reflects the microscopic scale of atoms and the relatively small quantity of graphite used in a pencil mark.
What instrument should you use if you find it necessary to mark up a map?
A Pencil
Why is it difficult to write on glass with a pencil?
Glass is a hard and smooth surface, making it difficult for the pencil to leave a visible mark. The graphite in pencils is not abrasive enough to scratch the glass and create a lasting mark. Additionally, the pencil lead is not easily visible on the transparent surface of glass.
Lead pencil to mark chromatography paper?
A lead pencil can be used to lightly mark chromatography paper to help identify and track samples during the process. However, it is important not to press too hard or use ink as it may interfere with the chromatography separation.
Why is erasing a pencil mark a physical or chemical change?
PHYSICAL
What is the possible problem with erasing a pencil mark with most pencil erasers?
The possible problem with erasing a pencil mark with most pencil erasers is that they can leave smudges or residue on the paper, making it look messy or unclear.
What are the two physical properties of pencil lead?
The two physical properties of pencil lead are its hardness and its ability to leave a mark on paper. Hardness determines how dark or light the mark will be, while the marking ability is due to the graphite composition of the lead.
Why does a pencil leave a mark on paper?
When a pencil is rubbed on paper fiction causes a small amount of the graphite from the core of the pencil to be left on the paper. This leaves a visible mark.
Why do pencil stabs leave a lasting mark on surfaces?
Pencil stabs leave a lasting mark on surfaces because the graphite in the pencil tip is hard and can scratch or indent the surface, leaving a visible mark that is difficult to remove.
What has the author Mark Pencil written?
Mark Pencil has written: 'White Sulphur papers' -- subject(s): Springs, Health resorts
How many atoms of carbon graphite in pencil mark?
A pencil mark primarily consists of graphite, which is made up of carbon atoms. In a typical pencil mark, there are approximately 10^19 to 10^20 carbon atoms in a single mark, depending on its size and thickness. This vast number reflects the microscopic scale of atoms and the relatively small quantity of graphite used in a pencil mark.
An MICR device senses the presence or absence of a mark such as a pencil mark?
False
What part of speech is the word pencil?
The word 'pencil' is a noun and a verb.The noun 'pencil' (pencils) is a word for a writing instrument.The verb 'pencil' (pencils, penciling, penciled) is to mark, draw, or write with with a pencil.
Is a 3B pencil darker than a 2B pencil?
Yes, a 3B pencil is darker than a 2B pencil. The higher the number in the pencil grade, the softer the graphite and therefore the darker the mark it will make on paper.
How long is the lifespan of pencil mark on paper?
The answer depends on a variety of variables, but the simplest is that barring further action on the pencil mark (rubbing, wear, etc), it will last as long as the paper.
What does a 4N pencil mean on a pencil?
There is no 4N... 4H = Extremely Hard and will make a light mark. 4B = Extremely Bold and will make a thick and dark mark. HOPE THIS HELPS! :)
