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.
Frictional Force.
frictional force
It is an acid acidic substance similair to that of citric acid found in lemons
Either that or wear gloves. Your trying to avoid direct contact.
Cobalt is a very strong glass, so it is used to make cooking wear or baking wear,and also used for simple things like glasses and mugs or cups. Sometimes they use coblat for windows, but that is rare since it can be hard to make a big piece of it.
Electroplating served a number of functions, such as protecting from corrosion and wear, decoration, and electrical shielding.
why do lumberjacks wear kevlar
I started my life as a blank slate, eager to be filled with knowledge and creativity. Over time, I became covered in markings and erased repeatedly, bearing the weight of countless lessons and ideas. Despite the wear and tear, I stand as a testament to the power of education and the impact of every stroke of chalk.
A dancer. Wear a dance recital dress and old dance shoes and wear your hair in a bun with a bun cover. If you have to be a fictional character from tv you could be a character from chalk zone. You could wear light blue clothing and outline your body in white chalk.
so they don't have to fall ever single when they get on it
It is an acid acidic substance similair to that of citric acid found in lemons
No
did Lorne Greene wear a hair piece? yes
Yes he does
Yes
yes
M be
Yess He Does.
yes