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Because solids work better than a liquids for the purpose of displaying information vertically. The molecules of the blackboard are rather tightly bound to each other and stay that way under the temperature and pressures that the blackboard usually encounters.
Yes, a blackboard is opaque because it does not allow light to pass through it. This characteristic makes it suitable for writing or drawing with chalk.
A blackboard can stay at the same temperature as the rest of the room through a process called thermal equilibrium. When the blackboard is exposed to the room temperature, it absorbs heat energy from its surroundings. As it absorbs heat, it reaches the same temperature as the room through conduction, where heat is transferred through direct contact with the surrounding air. This equilibrium ensures that the blackboard does not feel significantly warmer or cooler than the room itself.
Blackboards are usually sized in centimeters.
The color black is absorbed by the surface of the blackboard, making it appear black. The dark surface also helps to provide high contrast with white chalk, making writing and drawings more visible.
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Blackboard Inc. was created in 1997.
The population of Blackboard Inc. is 1,780.
advantages and disadvantages of blackboard
Beyond the Blackboard was created on 2011-04-24.
The duration of Murder on the Blackboard is 1.18 hours.
The duration of Beyond the Blackboard is 1.67 hours.
A blackboard is a large flat surface, finished with black slate or a similar material, which can be written upon with chalk and subsequently erased.
Meter is used in finding the width of the blackboard.
Go to google and type in your state and blackboard and it should come up.
The surface area depends on the height and width of the blackboard.
There is more than one size of blackboard...