Because "isotopes" change the properties of an element. For example, pure/true potassium is highly explosive, but with isotopes, it can make it nutrients for everyday consumption.
Tsunami is useful to generate electricity.
The Antarctic ozone hole is not useful. It was harmful.
Type your answer here... What is useful of a microorganism
media is very useful
Proteins are useful chemicals that you obtain from food.
Most useful and more useful.
more useful, the most useful
The comparative form of "useful" is "more useful."
more useful, most useful
Computers are so useful to us.Bert is not a very useful person.I find that the phone is a useful invention.Make yourself useful and pass me the spanner.Hopefully these sentences are useful to you.
how are mirrors useful ? how are mirrors useful ?
more useful and most useful
more useful, most useful
is nuclear deal useful for us? why nuclear deal is useful for us? is nuclear deal useful for us? why nuclear deal is useful for us? is nuclear deal useful for us? why nuclear deal is useful for us? is nuclear deal useful for us? why nuclear deal is useful for us?
useful
Extremely useful
Useful for...in a troop? Useful for...in a Circus? No offense, but what do you mean?