For medicine
Dropper are not a unit of measurement - they come in many sizes.
1 tablespoon is 15ml of the medicine
Each dose would be 2.5 ml, which means each dose would require 80 drops (2.5 ml * 32 drops/ml).
That is approximately 3/4 of a teaspoon
30 drops per ml 14.7 ml per oz. So 30 x 14.7. you do the math. Sorry to disagree. There are 14.7 ml in a tablespoon, but approximately 30 in an ounce (29.57 to be a little more accurate). The number of drops in an ounce would also depend on what size dropper you have. In medicine, if using an IV set, it is calibrated in 10, 15, 20 or 60 drops per ml. If you are using an eye dropper, the number of drops would be determined by the opening size in the dropper. So, that number can vary greatly from around 150 to close to 2000.
Each dose from a 15 ml container would be 4 ml (15 ml / 60 doses). Given that 1 ml equals 32 drops, each dose would contain 128 drops (4 ml * 32 drops).
A grain is a unit of measurement in medicine. A one half grain equals 30 mgs as part of the apothecaries system
you would use a dropper
There is no solution for those equations because the lines are parallel so, they never touch.
That is a difficult question - there are many mitigating factors in the size of a teardrop, including the saline content of the drop, and the hydration of the person crying. For reference, however, a medicine dropper usually drops a volume of about .05 mL.
It depends on the graduation of the syringe which, in turn, depends on its cross sectional area.