Discuss the advantanges and disadvantages of fusion power from the point of view of safety, pollution and resources.

With respect to power generation, what are the relative advantages and disadvantages of fusion type and Fission type reactors?

A plane is 1 km from one landmark and 2 km from another. From the planes point of view the land between them subtends an angle of 45^o . How far apart are the landmarks?

Which one is the most advanced from evolutionary view point

(i) A kabaddi coach has 14 players ready to play. How many different teams of 7 players could the coach put on the court? (ii) There are 15 persons in a party and if , each 2 of them shakes hands wit each with each other. How many handshakes happen in the party? (iii) How many chords can be drawn through 20 points on a circle? (iv) In a parking lot one hunderd, one year old cars are parked. Out of them five are to be chosen at random for to check its pollution devices. How many different set of five cars are possible? (v) How many ways can a team of 3 boys, 2 girls and 1 transgender be selected from 5 boys, 4 girls and 2 transgender?

A small pin fixed on a table top is viewed from above from a distance of 50 cm. By what distance would the pin appear to be raised if it is viewed from the same point through a 15 cm thick glass slab held parallel to the table ? Refractive index of glass = 1.5. Does the answer depend on the location of the slab ?

For a normal eye, the far point is at infinity and the near point of distanct vision is about 25 cm in front of the eye. The cornea of the eye provides a converging power of about 40 dioptres, and the least converging power of the eye-lens behind the cornnea is about 20 dioptres. from this rough data estimate the range of accommodation (i.e., the range of converging power of the eye-lens ) of a normal eye.