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The Micro Hollow Sphere set spheres are so small that Im having trouble knowing how much volume Ive put in one. How can I measure the amount of water that Ive added to each sphere?

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The Micro Hollow Sphere set spheres are so small that Im having trouble knowing how much volume Ive put in one. How can I measure the amount of water that Ive added to each sphere?

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There are several approaches to determining the amount of water added to the spheres. For these smaller spheres you can either try to determine the amount from directly reading before and after filling syringe volumes. If you use this approach, here are some hints for relatively accurate measuring: A. Use a TB type syringe, whose total volume is 1 ml or less. B. Be certain to get all bubbles out of the syringe, including the needle. C. Before filling the sphere, squirt out 1 or 2 drops of water into a waste receptacle; this helps ensure no air was left in the needle. Write down the volume shown on the side of the syringe. D. Subtract the post-filling amount of syringe contents from the pre-filling amount to calculate the water volume inserted into the sphere. The other method involves the weighing of the sphere before and after filling, calculating the weight, and converting to volume. The weights will be on the order of grams, and so you will need a fairly sensitive device. One that w

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