Water was found to rise to a height of 7.4 mm in a tube of internal radius 2.0 mm at room temperature.Given its density as 1.0 g.cm^-3,what is the surface tension of water?

Question

Quizplus · Accepted Answer

The surface tension (T) can be calculated using the formula for capillary rise: T = (h * r * ρ * g) / 2, where h is the height of the water column (0.74 cm), r is the radius of the tube (0.2 cm), ρ is the density of water (1 g/cm³), and g is the acceleration due to gravity (approximately 980 cm/s²). Substituting these values gives T ≈ 0.073 N/m.

Water Was Found to Rise to a Height of 7