Question

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 wan 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 cm2 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). d that allows the

Answer 1

Given information no.ot pore s 200 Surface TersionmN meler 0.078N Copilavihy yise is ghen by pgb icoox981x 0.001 0.020758 hm - 2.07388 Cm x 0.1 7.8S38 x 1o cm 3 2 volume o wokr int each pore Axh :0.0163039 cm3 Toaldurne ctuotr =vdume in eachpoe xm.tpoes - 0.0163039x 900 つ8.26078 cm3-Ans.