What is the drop weight method?

The drop weight method is an accurate yet simple technique for determining surface tension σ. It relies on dripping a liquid of density ρ at a low flow rate ˜Q from a capillary of radius R into air and measuring the combined volumes of the primary and satellite drops that are formed.

What is Tate’s law?

Tate’s law is the basis for the drop-weight method for de- termining surface tension.The proportionality constant, as. shown below, contains the surface tension of the liquid. being used. Tate’s law may be used to determine the radius.

What method is used for determination surface tension?

Du Noüy ring
Surface tension can be measured with force tensiometer using Du Noüy ring or Wilhelmy plate. Or with optical tensiometer using the pendant drop method.

Why is stalagmometer used?

A stalagmometer a simple and normally manual instrument for measuring the surface tension (SFT) of liquids and, more rarely, the interfacial tension (IFT) between two liquids.

What is drop number method?

‘drop’) is one of the most common methods for measuring surface tension. The principle is to measure the weight of drops of a fluid of interest falling from a capillary glass tube, and thereby calculate the surface tension of the fluid. We can determine the weight of the falling drops by counting them.

What is the meaning of ring method?

The du Noüy ring method is a technique for measuring the surface tension of a liquid. The method involves slowly lifting a ring, often made of platinum, from the surface of a liquid.

Why are rain drops spherical?

Raindrops start to form in a roughly spherical structure due to the surface tension of water. The cause is the weak hydrogen bonds that occur between water molecules. On smaller raindrops, the surface tension is stronger than in larger drops.

How do you measure tension?

The tension on an object is equal to the mass of the object x gravitational force plus/minus the mass x acceleration.

What is Parachor and its application?

: an empirical constant for a liquid that relates the surface tension to the molecular volume and that may be used for a comparison of molecular volumes under conditions such that the liquids have the same surface tension and for determinations of partial structure of compounds by adding values obtained for constituent …

How do you fill a Stalagmometer?

Fill the beaker with distilled water. Mount the tubing with balloon on the top end of stalagmometer. Immerse the bottom end of stalagmometer into water and fill it up, such that the water level is above the wide part of stalagmometer.

What do you mean by Parachor?

How do I take circcircumference measurements?

Circumference measurements are taken differently for men and women. The formula does not require hip measurements for men. Take waist measurements at the belly button for men and above the belly button for women. Click on the help (?) icon next to the input fields for measurement details.

How do I calculate my body fat percentage?

You can choose different measurement methods from the calculator’s drop-down list to calculate your body fat percentage. One is based on your Body Mass Index, a body circumference method developed by the U.S. Navy, and four skinfold measurement methods.

How accurate is the body mass index formula?

The formula takes sex and age into consideration. This estimation is not as accurate as body circumference or skinfold methods. It does, however, give a ballpark estimate for those of you who don’t want to bother with measuring tapes or skinfold calipers. Note also that it’s only intended for sedentary individuals.

How do we estimate paediatric weight in adults?

There are several methods to estimate paediatric weight in emergency or resource-poor situations when direct measurement is not possible, but there is no standard method of weight estimation in adults although many therapeutic interventions in adults are also based on weight.