Give some examples of application of heating effect of electric current in our daily life.

What is meant by Heating effect of electric current.

Give some examples of collections which are sets.

Give some examples of collections which are not sets.

Give some examples of total internal reflection in nature.

Give one example of imbibition occuring in the life of plants.

Give one example of the application of co-ordination compounds in medicines.

Define taxon . Give some examples of taxon at different levels.

Every great physical theory starts as a heresy and ends as a dogma. Give some examples from the history of science of the validity of this incisive remark.