Suppose you are inside the water in a swimming pool near an edge. A friend is standing on the edge. Do you find your friend taller or shorter than his usual height ?

A pole of length 1.00 m stands half dipped in a swimming pool with water level 50.0 cm higher than the bed. The refractive index of water is 1.33 and sunlight is coming at an angle of 45° with the vertical. Find the length of the shadow of the pole on the bed.

Suppose you and your friend are on the Moon. Will you be able to hear any sound produced by your friend?

Can you hear your own words if you are standing in a perfect vacuum ? Can you hear your, friend in the same conditions ?

The yield point of a typical solid is about 1%. Suppose you are lying horizontally and two persons are pulling your hands and two persons are pulling your legs along your own length. How much will be the increase in your length if the strain is 1% ? Do you think your yield point is 1% or much less than that ?

In a biology period, the teacher drew the heart of rabbit on the board and explained its structure and functions. After the class, your friend told you that he finds it difficult to understand the concept and felt he wanted a detailed explanation. In what way, the teaching can be made easily understandable?

In a biology period, the teacher drew the heart of rabbit on the board and explained its structure and functions. After the class, your friend told you that he finds it difficult to understand the concept and felt he wanted a detailed explanation. By what means the Visual Communication improve the learning ability?

In a biology period, the teacher drew the heart of rabbit on the board and explained its structure and functions. After the class, your friend told you that he finds it difficult to understand the concept and felt he wanted a detailed explanation. Do you think using technologies like Visual Communication help students to understand the difficult concepts in a simple way?

Kumar is going to build a house. To purchase the iron rods required for construction, he visited an Iron & steel shop nearby. The seller showed him some Iron rods which are fresh and good. He also showed him little older Iron rods which are brownish in appearance. The price of fresh rods are costlier than the older ones, the seller also gave some offer to older ones. Kumar's friend Ramesh advised him not to buy the cheaper rods. (b) Could you explain the reason for his suggestion?

The total number of electrons in the human body is typically in the order of 10^(28) . Suppose due to some reason you and your friend lost 1% of this number of electrons. Calculate the electrostatic force between you and your friend separated at a distance of 1m. Compare this with your weight . Assume mass of each person is 60 kg and use point charge approximation.

Express 2310 as a product of prime factors. Also see how your friends have factorized the number. Have they done it same as you? Verify your final product with your friend’s result. Try this for 3 or 4 more numbers. What do you conclude?