Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing

Why we prefer to wear dark coloured clothes in winters?

Why do we wear woolen clothes in winter?

Why do wear light coloured clothes in summer?

Why should we wear cotton clothes in summer ?

Why should we wear cotton clothes in summer ?

In an experiment to estimate the size of a molecule of oleic acid 1mL of oleic acid is dissolved in 19 mL of alcohol. Then 1 mL of this solution is diluted to 20 mL by adding alcohol. Now 1 drop of this diluted solution is placed on water in a shallow trough. The solution spreads over the surface of water forming one molecule thick layer. Now, lycopodium powder is sprinkled evenly over the film and its diameter is measured. Knowing the volume of the drop and area of the film we can calculate the thickness of the film which will give us the size of oleic acid molecule. Read the passage carefully and answer the following questions : why do we dissolve oleic acid in alcohol ?