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primary school large then 3600mm * 1000mm
middle school large then 4000mm * 1000mm
What else can I help you with?
Who uses a blackboard and chalk?
I am pretty sure it's a teacher.
Why blackboard called blackboard instead it calledgreen board?
The term "blackboard" originates from the traditional color of the writing surface, which is typically black or dark gray. This color allowed for high contrast with white or colored chalk, making it easier to read from a distance. While modern boards can be green or other colors, the name "blackboard" has persisted due to historical conventions. The green board, often referred to as "greenboard," is just a variation that became popular later.
What is the attraction between unlike molecules such as chalk and blackboard?
The attraction between unlike molecules, such as chalk and a blackboard, is primarily due to electrostatic forces. When chalk is rubbed on a blackboard, it can create a transfer of electrons, leading to the buildup of static charges. This charge difference generates an attractive force between the two surfaces, allowing the chalk to adhere to the blackboard. Additionally, van der Waals forces may also play a role in the interaction between these materials.
How long does it take for water to evaporate on a blackboard?
This depends on many factors.
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.
What did Matilda write on the blackboard?
Matilda wrote "I'm big, you're little. I'm right, you're wrong, and there's nothing you can do about it" on the blackboard.
How big was the first blackboard used for basketball?
2 inches by 4 inches.
When was Blackboard Inc. created?
Blackboard Inc. was created in 1997.
What is the population of Blackboard Inc.?
The population of Blackboard Inc. is 1,780.
What are the advantages and disadvantages of blackboard learning system?
advantages and disadvantages of blackboard
When was the blackboard created?
Beyond the Blackboard was created on 2011-04-24.
What is the duration of Murder on the Blackboard?
The duration of Murder on the Blackboard is 1.18 hours.
What is the duration of Beyond the Blackboard?
The duration of Beyond the Blackboard is 1.67 hours.
Unit of measure of width of a blackboard?
Meter is used in finding the width of the blackboard.
How do you get on to blackboard?
Go to google and type in your state and blackboard and it should come up.
What is the surface area of a blackboard?
The surface area depends on the height and width of the blackboard.
What width of a blackboard?
There is more than one size of blackboard...
