Tilak lighted a candle. Suma has kept her hand on the flame of the candle and removed the hand quickly. What happened in these reactions?

A wax candle burns with a yellow flame. The domestic gas burns when lighted with a blue flame. Why?

Two bodies A and B of masses 5 kg and 10 kg in contact with each other rest on a table against a rigid wall . The coefficient of friction between the bodies and the table is 0.15. A force of 200 N is applied horizontally to A. What are (a) the reaction of the partition (b) the action-reaction forces between A and B ? What happens when the wall is removed? Does the answer to (b) change, when the bodies are in motion? Ignore the difference between mu_s and mu_k

What happens. when a burning candle bring near to the hydrogen gas ?

Kshitija saw a medical camp on her way home. She went near the doctor and asked the purpose of the camp. The doctor told her that, he is cutting some part of the sperm ducts of males by operations and lying again with string. What would happen if the sperm ducts are removed

Lisa is playing with plane mirror, she has seen her image in it. She kept mirror in the Sun, when she touched it later, she felt that it is hot.What could be reason for that ?

The organ 'A' of a person has been damaged completely due to a poisonous waste material 'B' has started accumulation in his blood, making it dirty. In order to save this person's life, the blood from an artery in the person's arm is made to Dow into long tubes made of substance 'E' which are kept in coiled form in a tank containing solution 'F'. This solution contains three materials 'G', 'H' and 'I' and similar proportions to those in normal blood. As the person's blood passes through-long tubes of substance 'E', most of the wastes present in it go into solution 'F'. The clean blood is then put back into a vein in the person for circulation. What are G, Hand I?