Have you ever noticed?

Why is chilly hot?

The presence of a kind of chemical capsaicin makes it hot. The amount of capsaicin makes it hot, less hot or more hot. The amount of capsaicin in capsaicin is very low so, it is not hot so we use it as vegetable.

Sweet things remove the hotness we get after having chillies. Why?

When we eat chillies, capsaicin spreads around our tongue. The saliva and the juice of the sweet things wash the chemical and we don’t feel so.

Our eyes feel burning sensation and tears come out when we chop an onion. Why?

In the inner layer of the onion, there is an evaporative compound named thayopropelin sulphur oxide which makes our eyes feel so as it has pungent taste and smell.

Why is it difficult to measure the volume of an uneven sized substance by formula?       

 We know that , the volume of any  substance depends on the length(l) breadth(b) and height(h) of the same. But, in a case of an uneven sized substance, all the three components are irregular and uncertain. Therefore, the volume of such substance cannot be determined by using formula.                                 

Why is it easier to swim in a sea than in a pond?

The density of the salted water of sea is greater than that of the water of a pond. So, due to the greater density, swimming in a sea will require lesser strength whereas, the lesser density of the water of a pond makes it difficult to swim. Thus, we can conceive the fact that to swim in a sea is easier than to swim in a pond.