If we peel an apple and leave it, it will turn brown.This is because the polyphenol contained in apples combines with oxygen in the air to form a brown pigment.Apples contain polyphenols and substances called enzymes that oxidize them.Init…

When you take off your sweater, you will hear a crackling sound because there is a small thunder.The crackling sound of the sweater and the thunder are the work of static electricity that can be created by rubbing objects.What exactly is s…