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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.
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∙ 16y ago
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When was the last lead pencil made?
About 3 seconds ago. "Lead" pencils are the graphite ones we use all the time, those yellow things that you sharpen in a pencil sharpener. Lead is dark gray and leaves such a mark on paper. It isn't really lead in the pencil, we just say that.
How many miles can a number 2 pencil write?
55Answer:Obviously the answer varies with how heavy a mark you leave and the length of the pencil. Start by assuming that a pencil is 17 cm long and has a diameter of 0.2 cm (which gives a volume of just under 0.55 cm3. If you just touch the paper so the line is 1 layer of carbon atoms thick (about 1 nm) and the full 0,2 cm wide the line would be somewhat under 300 km (180 mi) long. Application of some skill in twisting the pencil so the line is thinner could double or triple the line length.
What is the function of a pencil?
the function of a pencil is to write with out getting your hands dirty and to be able to write on paper instead of stone.
How do you write a sermon?
You start with a pen/pencil and some paper.
How to construct ellipse?
Fix two pins, through a sheet of paper, into a board. Take a string and make a loop that is large enough to go around the two pins with some slack. Put a pencil inside the loop formed by the string and pull the pencil out as far as it will go. When moved round the pins, with the string tight, the pencil will enable you to mark out an ellipse.
What type of kinetic friction is used to write with a pencil?
Static friction is the type of friction used when writing with a pencil. As the pencil moves across the paper, static friction between the pencil tip and the paper surface enables the pencil to grip and leave a mark.
Does a pencil need friction to write?
Yes, a pencil needs friction to write. When you apply pressure to the pencil against the paper, the friction between the graphite tip and the paper creates the marks. Without sufficient friction, the pencil would not be able to leave a mark on the surface.
What minerals is soft enough to leave streaks on paper?
The mineral graphite is soft enough to leave a mark on paper. We use graphite, which is a form of carbon, as pencil lead. And it works pretty darn well at leaving marks on paper.
What type of FRICTION is created when you write with a pencil?
The friction created when writing with a pencil is primarily kinetic friction. As the pencil moves across the paper, the tiny irregularities in the paper and pencil lead create resistance that enables the pencil to leave a mark.
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.
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.
When can friction be useful for a pencil?
Friction is useful for a pencil when writing or drawing as it creates the necessary resistance between the pencil tip and the paper to leave a mark. This friction helps transfer the graphite or ink from the pencil onto the surface, allowing for clear and precise writing or drawing.
Is it true pencils do not need friction to write?
No, pencils do require friction to write. When a pencil is pressed against paper, the friction between the graphite tip and the paper surface causes the graphite to leave a mark. Without this friction, the pencil would not be able to write.
Do pencils need friction to write with?
Yes, pencils need friction in order to write. The friction between the pencil lead and the surface of the paper allows the lead to leave a mark as it rubs off onto the paper. Without friction, the pencil lead would not be able to transfer onto the paper.
What mineral is soft enough to leave a streak on paper?
The mineral that is soft enough to leave a streak on paper is graphite. Graphite is a form of carbon and is commonly used in pencils due to its softness and ability to leave marks on paper.
Why do you consider yourself as a pencil?
I consider myself as a pencil because like a pencil, I believe in the power of expression and creativity. Just like a pencil leaves its mark on paper, I aim to leave a positive influence or impact on others. Additionally, a pencil can be used to correct mistakes and improve, which reflects my belief in constant growth and learning.
Why do pencils work?
Friction of the paper allows the soft pencil to leave a trace of fine particles behind on the paper.
