Exercise 2 A U-shaped wire having a length of 6.2 cm is lowered into acetone at 20°C. As the wire is raised a liquid film forms on both sides of the wire, and a force of 3.13 x 10-³N-¹ has to be applied in order to break the film. What is the surface tension of acetone? [Answer: 2.52 x 10-2 N m²¹]
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
![Exercise 2
A U-shaped wire having a length of 6.2 cm is lowered into acetone at 20°C. As the wire is
raised a liquid film forms on both sides of the wire, and a force of 3.13 x 10-³N-¹ has to be
applied in order to break the film. What is the surface tension of acetone?
[Answer: 2.52 x 10-2 N m²¹]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9e02b741-e6c3-4952-adc3-dec6b7669b68%2F33280cbd-9539-4bc8-bf55-9f5bb172c021%2Fk3lt92l_processed.jpeg&w=3840&q=75)
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