Assume contaminants can only be transported by capillary rise. a) Calculate the capillar rise in the xylems (the height where contaminants can rise) b) Draw a diagram of capillary rise of soil water in the xylems showing the contact a

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Chapter8: Natural Convection
Section: Chapter Questions
Problem 8.16P
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Question: Sunflower is 2 m long and diameter of the xylems (capillary tubes of plants carrying
water from root to top) are 500 micrometer.
Soil water has a surface tension of 0,0728 N/m and the contaminants in the soil water do not
affect surface tension of water. Contact angle between the soil water and xylems can be
taken as 85°
Assume contaminants can only be transported by capillary rise.
a) Calculate the capillar rise in the xylems (the height where contaminants can rise)
b) Draw a diagram of capillary rise of soil water in the xylems showing the contact angle.
c) Can the contaminants in the soil water reach the sunflower at the top of the plant? So,
based on this, evaluate if it is safe to eat the sunflowe seeds?
Plant length
2m
Xylems
(carry soil
waterfrom root
to top)
Roots take up soil water
and contaminant
Transcribed Image Text:Question: Sunflower is 2 m long and diameter of the xylems (capillary tubes of plants carrying water from root to top) are 500 micrometer. Soil water has a surface tension of 0,0728 N/m and the contaminants in the soil water do not affect surface tension of water. Contact angle between the soil water and xylems can be taken as 85° Assume contaminants can only be transported by capillary rise. a) Calculate the capillar rise in the xylems (the height where contaminants can rise) b) Draw a diagram of capillary rise of soil water in the xylems showing the contact angle. c) Can the contaminants in the soil water reach the sunflower at the top of the plant? So, based on this, evaluate if it is safe to eat the sunflowe seeds? Plant length 2m Xylems (carry soil waterfrom root to top) Roots take up soil water and contaminant
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