0
What else can I help you with?
Explain Why blackboards are not scratched by chalk but by the sand embedded in the chalk?
Blackboards are typically made of a material that is softer than chalk, such as slate or porcelain. When you write on a blackboard with chalk, the friction between the chalk and the board causes the chalk to wear down and leave behind tiny particles of sand or abrasive material embedded in the chalk. These abrasive particles then scratch the surface of the blackboard as you write, creating marks that can be difficult to erase.
When written in wet chalk first it is not visible but later it is visible why?
Some of the chalk is dissolved into the water and so when you write on a board the chalk can not easily be seen. The water then evaporates leaving only chalk behind therefore becoming visible.
How do you crush a chalk board?
Crushing a chalk board is not recommended as it can create a mess and cause damage to the surroundings. If necessary, it is best to dispose of an old chalkboard properly by recycling or seeking professional assistance for dismantling.
What a piece of calcite is used to write or draw on blackboards?
It is chalk.
When does a chalk stick make a sound?
A chalk stick makes a sound when it breaks or when it is used to write on a surface like a chalkboard. The sound is created by the friction between the chalk and the surface or by the chalk snapping or tapping against something.
What pioneers used to write with on a chalk board?
Chalk
What is used with chalk?
You can use it in homemade toothpaste recipes in place of baking soda. Also used in the construction trade when 'snapping' a chalk line on a board, etc.
What you use to write on the board is called?
it is called a marker, or you can also use chalk
What did children write with during World War 1?
Chalk on Slate board
Why it is possible to write on rough black board?
It is easy to write on a rough blackboard. The friction between the chalk and the rough surface is what allows the chalk to leave behind the chalk dust that we see. Actually it would impossible to write on a theoretically smooth blackboard. Without the friction, the chalk would not leave any residue!
Why is it possible to write on a blackboard with chalk?
Chalk is made of calcium carbonate, a soft mineral that leaves a visible mark when drawn on a rough surface like a blackboard. When drawn on the blackboard, chalk particles rub off and stick to the surface due to friction, creating a visible line.
Where can chalk be found?
near a chalk board
When does a chalk stick make a sound when you write with it?
It always makes some kind of sound. The more smooth, dry or shiny the surfaces of chalk and board, the more squeaky it becomes.
It's urgent How would you find the number of 'chalk molecules' it takes to write your name on the board What would i need to do?
To find the number of chalk molecules it takes to write your name on the board, first measure the length of your name in centimeters. Next, estimate the thickness of the chalk line you would draw, then calculate the volume of chalk used by multiplying the length by the thickness. Finally, divide this volume by the volume of a single chalk molecule to determine the total number of molecules needed. You may need to use the density of chalk and the molecular weight to find the volume of one molecule.
What is the Luhya translation of chalk board?
The Luhya translation of the English words 'chalk board' is "lisisi lie ichoka".
What compound word goes with chalk?
A compound word with chalk is chalkboard.
What is the size of the chalk board?
5x2x1.5
