Incandescent lamps are filled with nitrogen at low pressure . What is the advantage of doing so ?

A newspaper report reads like this. Conventional agricultural products like cereals and other seeds may not be able to meet the demand of food according to the increase in population. So focus has to be shifted to alternative food sources like SCPs. What are the advantages of SCPs?

Incandescent lamp, discharge lamp , C.F.L, LED lamp, arc lamp are given for observation . Answer the following questions after observing them. Which metal is used to make filament of an incandescent lamp ? What are the advantages of using this metal as a filament ?

A cat is able to find on its feet after a fall, taking the advantage of principle of conservation of angular momentum. Explain how cat is able to do so