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    Hi, am at the planning stages of my AS coursework and am doing the pigment test.
    I have decided to use an object 30mm long in a test tube and i need to add an amount of water that will cover the object but not too much.
    Can anyone help and suggest a suitable amount of water to use?
    Thanks!
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    Got no idea what you are on about. Rephrase question
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    sorry been at college all day!
    i have to do an experiment where i put pieces of vegetable in test tubes. the vegetable pieces are 30mm long and in order to heat them i have to fill the test tubes with water. my teacher said to do it so that is covering the vegetable but not too much, so i was asking for suggestions about how much water to put in the test tubes??
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    Can't you put enough water to cover the veg? With an extra few ml just to prevent the water from evaporating, and leaving the veg "dry" as it were
 
 
 

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