Look at the data table and graph for the 25-coil electromagnet. with the 1.5 v battery, the electromagnet picked up an average of 6 paper clips, and with the 6.0 v battery, it picked up an average of 23 paper clips. a. about how many times stronger than the 1.5 v battery is the 6.0 v battery? b. what is the approximate ratio of the number of paper clips picked up using the 6.0 v battery to the number picked up using the 1.5 v battery? c. is this a direct relationship or an indirect relationship? 25-turn electromagnet battery voltage number of paper clips picked up first try second try average 1.5 v 5 7 6 3.0 v 12 12 12 4.5 v 14 17 15.5 6.0 v 20 26 23

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.