Can you burn a piece of wood by bringing a lighted matchstick near it?

How many regular pieces of wood of length 2m.breadth 2.5cm and thickness 4 cm.can be obtained from a log of wood of length 6m.,breadths 15cm and thickness 40 cm.?

Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. How will she find the nature of the gas?

How can you determine co-efficient of friciton by inclined plane method?

Can you name a few fuels. used in our homes?