A condenser
A condenser
A condenser
its not
Biotechnological industries.
The useful life of land improvements can vary significantly depending on the type of improvement and environmental factors. Generally, common land improvements like landscaping, parking lots, and drainage systems may have a useful life ranging from 10 to 30 years. However, factors such as maintenance, location, and usage can influence this duration. Unlike buildings, land improvements typically do not depreciate in value, but their functional lifespan can be affected by wear and tear over time.
The bicycle wasn't discovered, it was invented. A man with an idea had someone build a contraption. The design was somewhat useful, so after a while someone else thought of improvements, and had a slightly different machine built. Later, someone else thought of more improvements, built yet another version. And so it went, until we got the bike of today.
The design helps make a sketch of how it will work and the main bluprint
they can be useful in the future annd when we run out of supplies
Same reason anything is improved - to make it better. Stronger, lighter, more useful...
It is making the design useful, comfortable and suited to the person that is useing that item ,
Short answer Yes. Petrol is useful for running a engine, and extremely dangerous if misused.
The engine will not run without a supply of petrol so you would think it is useful.