Maybe 2.5 metres
Their is no record
Depends on the eraser
mechanical chalk dust dispenser's hypothesis is that it aims to hasten the removal of chalk dust on the chalkboard eraser
it can help to minimize of having running nose especially oh having an allergic to the dust.
Eraser is made out of rubber. If exposed under the sun, an eraser will take between 50 to 80 years to biodegrade.
About one whole month
A rubber is about 2.5cm. It depends on how long or short your rubber is.
i mean there are some like 3 inches long but some erasers or like 6-8
The longest song ever in the USA was 75 minutes
There are many different names for this. The most common among artists seem to be "eraser residue" or "eraser dust". I've also heard it called "eraser crumbs", which probably comes from the use of bread crumbs to erase prior to the discovery of rubber as an effective eraser. Some people have their own names for it too, such are eraser "bits", "shavings" and "leavings".
About 5 cm.
It doesnt