This was quite hard to answer but after a while i got it, the answer is a glow stick when you break it it glows haha
Eggs are more useful after they are broken.
A pencil lead - it becomes sharper and more useful for precise writing when it is broken.
An egg
Silence is most useful when broken.
Eggs haha NOT a glow stick
The controlled process by which hydrocarbons are broken down or rearranged into smaller, more useful molecules is called catalytic cracking.
cracking is useful because large hydrocarbon molecules are broken into smaller ones. And these are needed for petrol and are more reactive.
A glow stick is only useful when it is broken, as this allows the chemicals inside to mix and produce light.
A Catalyst used to "Break Down" Long Hydrocarbons into smaller, more useful ones...
A broken clock is often said to be more useful than a functioning one if it is stopped at a time that matches the current hour, as it can still provide the correct time twice a day. Additionally, a broken tool can sometimes still serve a purpose, such as a cracked pot that can be used for planting. In these cases, the value lies in its potential utility despite its imperfections.
It means that the egg is not useful any more. If in it was a bird or duck or somthing, it means that it is dead.
The comparative form of "useful" is "more useful."