Question

4. 5 points A device for sampling water in lakes and streams consists of a 2.25 cm diameter cylindrical tube that is 3 cm in length. The disks are placed in a wand that allows the technician to insert the sampling disk into the water. The tubes are then sealed in a container and taken back to the lab where the water is removed from the tube and analyzed. The tube is made of glass and contains 200 cylindrical pores 1 mm in diameter that run along the axis of the cylindrical tube. The water is drawn into the pores by capillary action. What volume of water in cm3 will be drawn into the pores of the glass tube? Assume water has a surface tension of 72 milliNewtons/meter, a density of 1000 kg/m3, and that the contact angle between the water and the glass surface is 45 degrees. (note the cos 45deg- 0.7071).

Answer 1

H20 around 2

3.261 m