Why does a candle flame defy gravity and burn upward? What will happen on lighting a candle in space?

Why does a candle flame defy gravity and burn upward What will happen on lighting a candle in space

We all experienced lighting a candle once in a while. We light it up when the electricity is down, when used as a decoration, and sometimes we even use it for therapy. We could trace back the use of candles in the early 3000 BC, when the ancient Egyptians used it in … Read more

What substance is the white powdery coating on grapes?

What substance is the white powdery coating on grapes

What is it: Have you ever seen a white, powdery substance on grapes? Many people believe it is pesticides. This assumption, while incorrect, is valid due to the prevalence of using such chemicals in agriculture today. This substance is actually composed of several different materials.  The first material, comprising most of the … Read more