My Chemistry questions

How can you burn an apple, blueberry, rose and pumpkin without leaving any ashes but retaining the smell of it?

candles

Explanation:

if u burn these fruits, it is obvious that there will be ashes but the key hint here is

" retaining the smell"

and what are things that smell and can be fruit scented?

a CANDLE

hope this helped :D

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.