Question

0.30 m LEARN MORE QUESTION Based on the result of this calculation, is capillary action likely to be the sole mechanism of water and nutrient transport in plants? Explain. (Select all that apply.) No, unrealistically narrower tubes would be needed for taller plants. No, the capillary tube in the example is already unrealistically wide and wider tubes would be needed for taller plants. No, many plants are much taller than 0.3 m. Yes, because evaporation of water from the leaves will provide the energy to lift water within the plant through capillary action. Yes, because all vascular plants have capillary tubes within them. PRACTICE IT Use the worked example above to help you solve this problem. Find the height to which water would rise in a capillary tube with radius equal to 4.6 x 10-5 m. Assume that the contact angle between the water and the material of the tube is small enough to be considered zero. EXERCISE HINTS: GETTING STARTED I I'M STUCK! Suppose ethyl alcohol rises 0.180 m in a thin tube. Estimate the radius of the tube, assuming the contact angle is approximately zero. (Use 0.022 N/m and 806 kg/m for the surface tension and density of ethy! alcohol respectively.) m Need Help? Talk to a Tutor 16. -/3 points SerCP9 9.AE.018.

Answer 1

The height and radius

Height is obtained by - n= 2 T colo Ts Susfall tension .8 gr Ssdensity rs radius Y T=0.0728 mm h = 2 x 0.0728 Coscoll 1000 x 9.8x4.610-S = 0 - 323 m h = 2 T (Oslo) Рәх 8= 2I=2X0.022 Ря и Po6 Х 9.8Х o'tgo go 3o|xo-sm