What is the property of the pencil?

What is the property of the pencil?

Most pencil cores are made of graphite powder mixed with a clay binder. Graphite pencils (traditionally known as “lead pencils”) produce grey or black marks that are easily erased, but otherwise resistant to moisture, most chemicals, ultraviolet radiation and natural aging.

What are the physical properties of pencil lead?

Lead has a density of 11.34 g/cm3 at 20°C, a melting point of 327.4°C, a boiling point of 1725°C, and a specific heat capacity at 20°C of 0.128 kilojoule/kg°K (0.0306 calorie/g°C).

What are physical properties give 3 examples?

Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. We can observe some physical properties, such as density and color, without changing the physical state of the matter observed.

What are 3 physical properties to describe paper?

Physical properties of paper sheets are determined by basis weight, thickness, density, two-sidedness, smoothness, permeability, handle, rigidity, roughness, and porosity, which in turn affect sheet properties of softness, hardness, compressibility, dimensional stability, curl, and strength (Casey 1980; Bolam 1962).

What are the properties of spoon?

It is iron-based alloy and has high heat resistance. It is easy to clean and hygienic and stainless spoon can be recyclable. A silver spoon appears white, lustrous, soft, very ductile and when it is exposed to air or oxygen the silver spoon gets dull while a stainless spoon doesn’t.

How many types of pencil are there?

The two main options you have for drawing are graphite and charcoal pencils. Graphite pencils have a wide range of grades and are useful for sophisticated drawings which require finer detailing.

What are physical properties of soil?

Physical properties of soil include color, texture, structure, porosity, density, consistence, aggregate stability, and temperature. These properties affect processes such as infiltration, erosion, nutrient cycling, and biologic activity.

What are properties of a fork?

In cutlery or kitchenware, a fork (from Latin: furca ‘pitchfork’) is a utensil, now usually made of metal, whose long handle terminates in a head that branches into several narrow and often slightly curved tines with which one can spear foods either to hold them to cut with a knife or to lift them to the mouth.

What are some physical properties for a pencil?

Some physical properties that a pencil would have is, color, density, texture, hardness (in this case the lead is soft).

What is pencil lead really made of?

“What is pencil lead made of?” The core of a pencil composed of graphite (a form of compressed carbon) and clay. This graphite core is commonly called a “lead” (like the metal), though it does not, nor has it ever, contained lead. The reason it is called “lead” is because when the material was first discovered,…

What is the structure of a pencil?

A pencil is usually made with a piece of graphite mixed with clay that has a wood case around it. The shape is usually a hexagonal prism but some pencils are square or cylinder.

What are common uses of graphite?

List of Uses of Graphite Writing Materials. The word graphite is from the Greek language which translates as ‘to write’. Lubricants / Repellents. Graphite is one of the main ingredients in lubricants like grease, etc. Refractories. Nuclear Reactors. Electrical Industry. Graphene Sheets.