physics of class ninth

If we evaluate the increase in volume of the liquid taking into account the expansion of the vessel also, then we say it is absolute expansion of the liquid. We can show that, The coefficient of absolute expansion of a liquid = coefficient of apparent expansion + coefficient of cubical expansion of..

>Now, suppose that the slab is cut lengthwise into two parallel slabs (fig.(b)) each of area A/2. If the current flowing through the full slab is I for a given voltage V, then the current flowing through each half -slab is I/2. Therefore, the resistance of each half - slab is twice that of original..

A seconds pendulum is a pendulum which takes 2 seconds for one oscillation. Experiment : Simple Pendulum Experiment Aim : To prove that T l. Procedure : Tie the hook of the bob on one end of a thread (more than 1 meter). Clamp the other end firmly between the gap of a split cork whic..

. To use the pipette the lower end A is dipped into the liquid and air is drawn out from the pipette for the liquid to come up. Volume of a liquid is usually measured in a unit called 'liter' 1 liter = 1000 cm 3 (cc) 1 m 3 = 1000 liters 1 liter = 1000 mL (milliliter) 1 mL = 1 cm 3 (1 cc) Density &q..

What is Physics? - The word 'Physics' comes from the Greek word 'phusis' meaning 'nature', introduced by the ancient scientist 'Aristotle'. Man has always been fascinated by nature. So, he questioned and sought answers for every phenomena nature could offer. The branch of scienc..

Physical World and Measurement - Humans have always been curious about the world around them. The world has an astonishing variety of materials and bewildering diversity of life and behaviour. The inquiring and imaginative human mind has responded to the wonder and awe of nature in differ..

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You have learnt in the earlier chapters that flow of electrons constitutes an electric current and current can be generated from a battery or a generator. Scientists later discovered that there are many other ways of producing the stream of electron..

Introduction - You have learnt in the earlier chapters that flow of electrons constitutes an electric current and current can be generated from a battery or a generator. Scientists later discovered that there are many other ways of producing the stream of electron..

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