A group of pesticide sprayers were worried about their profession when all the mosquitoes got exterminated . How can you explain that such an anxiety was based on ignorance.

Solids can be classified into three types on the basis of their electrical conductivities. How will you explain such classification based on Band theory ?

Solids can be classified into three types on the basis of their electrical conductivities. How will you explain such classification based on band theory?

In a tug of war, when the two teams are pulling the rope, a stage comes when the rope does not move to either side at all. What can you say about the magnitudes and directions of the forces being applied to the rope by the two teams at this stage ?

Diksha Ltd. Was marketing diswashers which were very popular due to their quality and after-sale services provided to the customers. The company was a leading company in the market and earing huge profits. Because of huge profits the company ignored its after- sale services. As a result its relations with the customers got spoiled and the image of the company was damaged in the eyes of the public. Top management became concerned when the profits for the current quarter fell steeply. On analysis it was revealed that ignoring after-sale services was its reason. Therefore, the company took all possible measures to protect and promote its image. As a result the goodwill of the company improved in the society. Also explain role of the tool as identified in part (i).

(a) Can you now tell the order of the rotational symmetry for an equilateral triangle ? (b) How many position are there at which the triangle looks acactly the same when rotated about its centre by 120^(@) ?