A piece of chalk.
The iron nail has the greatest force of attraction due to its magnetic properties, followed by the piece of chalk which has minimal attraction, and the rubber band has the least as it is non-magnetic and non-conductive.
The hard rubber would acquire a negative charge as electrons move from the wool to the rubber. Wool has a higher tendency to lose electrons, leaving the rubber with an excess of electrons and thus a negative charge.
Centimetres or millimetres would be used to measure the length and width (diametre) of a piece of chalk as used by a teacher in the school classroom. When I went to school in Liverpool, England - too many years to admit, it was inches and halves, eighth and sixteenth of an inch! Nowadays, it would be the interactive whiteboard and digital displays (we just had white chalk on a blackboard). But, the metric centimetres and millimetres would still be used nowadays.
When a rubber balloon is taped, the adhesive creates a barrier that helps keep the air inside. When the needle is inserted, the tape and the rubber stretch and distribute the force over a larger area, preventing a sudden rupture. This dispersion of force helps to prevent the balloon from bursting.
The irritating noise when writing on a chalkboard happens at certain angles due to a phenomenon known as "stick-slip motion." When the chalk is held at these angles, it alternates between sticking and slipping on the board surface, creating vibrations that produce the noise. At other angles, the chalk moves more smoothly without the stick-slip behavior, resulting in no noise.
When a piece of chalk is broken into pieces, there is a physical change as the chalk is simply being divided into smaller fragments. The chemical composition of the chalk remains the same even though it is now in multiple pieces.
Crushing a piece of chalk is only a physical change. Chemically, it is still chalk.
The iron nail has the greatest force of attraction due to its magnetic properties, followed by the piece of chalk which has minimal attraction, and the rubber band has the least as it is non-magnetic and non-conductive.
With every stroke of the chalk piece it leaves some of the chalk on the board. This abrasion of the piece of chalk causes it to wear down. This is similar to why the rubber tyres of cars wear down when they are driven over a road surface.
No, once chalk dust has been created from a chalk stick, it cannot be transformed back into a solid piece of chalk. The dust particles are broken down and cannot reassemble into a solid form.
a chalk piece can be broken easily but not an iron piece because iron has greater intermolecular force of attraction which keeps the particles together . the strength of this force of attraction varies from one kind of matter to another
Yes, you can replace pieces of your set that are broken by purchasing another one of the piece that was broken.
You can glue it back on, but don't use rubber cement. Most model glues will work fine and even better is super glue!
Tailor's chalk is a type of chalk that is designed to make temporary markings on cloth. Using this chalk, a tailor can mark where fabric needs to be cut or garments altered. Once the markings are no longer useful, they can be easily brushed off or washed out, leaving no residue behind.
Centimetres and/or millimetres - depending on the size of the piece !
A piece of chalk is an insulator. It does not conduct electricity due to its high resistance to the flow of electrical current.
Because they have different magnetic properties; iron is strongly ferromagnetic.