Question

• A long capillary tube with both ends open is filled
with water and held in vertical position. If the surface
tension is 70 dynes/cm, the radius of tube is 0.95
mm and the angle of contact is zero, length of water
columm in the tube is
1) 1 cm 2) 3 cm 3)9.5 cm 4) 7 cm​

Answer 1

the answer is a ......

Given: Radius of capillary tube = r =0.95mm = 0.95 × 10-3 m , Surface tension = T =0.04 N/m, Acceleration due to gravity = g = 9.8 m/s2, Density = ρ = 0.8 g/cc = 0.8 × 103 kg/m³, Angle of contact = θ = 10°