Question

Data Table 3. Drops of Water. Estimation Result Drops of water 0g &Drops of water Questions A. How did the experiment in Part I demonstrate surface tension? Use your experiment observations when answering this question. B. In Part I, when adding the needle to the water, which approach worked best to balance the needle on the water-the vertical or horizontal placement? Explain your answer. C. In Part II, how did your paper clip estimation compare to your paper clip results? D. In Part ill, how were the properties of adhesion and cohesion demonstrated in the experiment? Exercise 2: Capillary Action Data Table 4. Capillary Tube Hypothesis. Hypothesis

Answer 1

Ans:

1) When need goes vertically, a surface area of needle become smaller so water let it go straight down, but when put it horizontally, a surface area of needle become larger so water molecule doesn't let it break the surface tension.  

2) Horizontal placement, Because of the large surface area to hold up the needle.

3) My estimation was way off from what it actually took to break the surface tension and cause the water to spill over. (exactly I don't know your paper clip experiment result that's why I can't say more on this part)

4) Adhesive part - Water tried to cover a surface of a coin.

Cohesive part - Waterdrops creating a dome on the surface of a coin and spilled off when bonds could no longer hold.