An empty flask has a mass of 123.4 g. when the flask is filled with water, the madd is 211.6g. if 10.0g of zinc (d=7.14 g/cm^3) are added to the flask filled with water (and the sides of the flask are dried from the displaced water) what is the new volume in the flask? (hint: you are going to have to use the density of water to answer this question)

- 89.6 mL

Solution:- Mass of empty flask = 123.4 g

mass of flask filled with water = 211.6 g

So, mass of water in the flask = 211.6 g - 123.4 g = 88.2 g

we know that density of water is .

So, volume of water in the flask =

= 88.2 mL

Mass and density is also given for Zn metal. So, we could calculate the volume of metal also using the same formula used for water.

volume of Zn =

= 1.40 mL

New volume of the flask would be the sum of the volumes of water and metal.

So, new volume of the flask = 88.2 mL + 1.40 mL = 89.6 mL

Hence, the new volume of the flask after adding the metal to it is 89.6 mL.

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.