Chemistry, asked by prachi200559, 10 months ago

give reason why marks of chalk remain on the blackboard even after erasing it .

Answers

Answered by ajdynamo1234

Answer:

Chalkboards work because the slate is not really smooth. On a microscopic level it has many tiny pits. Chalk gets into these pits and an eraser does not get to all of it.

Explanation:

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Answered by mayajakhar79

Answer:

$<!DOCTYPE html><html><head><title>SVG Text Animation</title><style>body{margin:0;padding:0;background-color:#444;}.a{stroke-dasharray: 2000;stroke-dashoffset: 0;animation: dash 20s linear;text-shadow:0px 0px 20px red;}@keyframes dash{from{stroke-dashoffset: 2000;}to{stroke-dashoffset: 0;}0%{fill: none;}30%{fill:lime ;}from{stroke: gold}to{stroke: ;}}</style></head><body><svg width="100%" height="500" ><text class="a" x="5px" y="200"style=" font-size: 60;stroke:#f00;fill: #red;">Answer</text></svg></body></html>$

Chalkboards work because the slate is not really smooth. On a microscopic level it has many tiny pits. Chalk gets into these pits and an eraser does not get to all of it

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