A traveler heading on a trip packs a bag of mixed nuts for the plane. As the plane travels higher in the atmosphere, the inside pressure of the plane decreases to 85 kPa. Midway through the plane ride, the traveler decides to have the mixed nuts as a snack. The traveler discovers that the bag has inflated when it is taken out to be opened. The initial volume of the bag of mixed nuts was 250 mL at 101 kPa. With the information provided, what is the new volume of the bag of mixed nuts on the plane?

the answer would be a

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.