Why does this milk take a long time to set as curd?

Why does the coil rotate?

Why does it takes sometimes to see objects in a dim room when we enter the room from bright sunligth outside ?

Why does a person standing for a long time get tired when he does not appear to be doing any work ?

Observe the statemens Manju boils the milk immediately after taking out from the refrigerator. Kavitha keeps the milk outside for some time to get the room temperature, than boils the milk.

This disease lasts for long time.

Why cranes have legs and long beaks?

Why does the picture get distored?

How the milk change in to curd?

Why does the setting sun appear red ?