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Jatin puts a pencil into a glass contain...

Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state.
What change is observed in the appearance of the pencil?

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To understand the change observed in the appearance of the pencil when placed in water, we can break down the explanation into clear steps: ### Step-by-Step Solution: 1. **Understanding the Setup**: - Jatin places a pencil into a glass container filled with water. - The pencil is partially submerged in the water. ...
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Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state. Name the phenomenon responsible for the change.

Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state. Draw a ray diagram showing how the eyes saw the pencil.

A student puts his pencil into an empty trough and observes the pencil from the position as indicated in Figure. (i) What change will be observed in the appearance of the pencil when water is poured into the trough? (ii) Name the phenomenon which accounts for the above stated observation. (iii) Complete the diagram showing how the student's eye sees the pencil through water.

A child wanted to separate the mixture of dyes constituting a sample of ink. He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in figure. The filter paper was removed when the water moved near the top of the filter paper. (a) What would you expect to see, if the ink contains three different coloured components? (b) Name the technique used by the child. (c) Suggest one more application of this technique.

(a) A student dropped a few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was passed through lime water. What change would be observed in lime water ? Write balanced chemical equations for both the changes observed. (b) State the chemical property in each case on which the following uses of baking soda are based: (i) as an antacid (ii) as a constituent of baking powder.

Newton's laws of motion are applicable in all inertial reference frames. Some physical quantities, when measured by observers in different reference frames, have exactly the same value. Such physical quantities are called invariant. In Newtonian mechanics mass, time and force are invariant quantities . On the other hand, some physical quantities, when measured by observer in different reference frames, do not have the same value. Sigmae physical quantities are called not invariant . In Newtonian mechanics displacement, velocity and work ( which is the dot product of force and displacement) are not invariant. Also kinetic energy (=1/2mv^(2)) is not invariant. Physicists believe that all laws of physics are invariant in all inertial frames, i.e. the work-energy principle states that the change in the kinetic energy of a particle is equal to the work done on it by the force. Although, work and kinetic energy are not invariant in all reference frames, the work-energy principle remains invariant. Thus even though different observers measuring the motion of the same particle find different values of work and change in kinetic energy, they all find the work energy principle holds in their respective frames. Choose the invariant quantities from the following

Newton's laws of motion are applicable in all inertial reference frames. Some physical quantities, when measured by observers in different reference frames, have exactly the same value. Such physical quantities are called invariant. In Newtonian mechanics mass, time and force are invariant quantities . On the other hand, some physical quantities, when measured by observer in different reference frames, do not have the same value. Sigmae physical quantities are called not invariant . In Newtonian mechanics displacement, velocity and work ( which is the dot product of force and displacement) are not invariant. Also kinetic energy (=1/2mv^(2)) is not invariant. Physicists believe that all laws of physics are invariant in all inertial frames, i.e. the work-energy principle states that the change in the kinetic energy of a particle is equal to the work done on it by the force. Although, work and kinetic energy are not invariant in all reference frames, the work-energy principle remains invariant. Thus even though different observers measuring the motion of the same particle find different values of work and change in kinetic energy, they all find the work energy principle holds in their respective frames. Which of the following quantities is invariant?

ICSE-SELF ASSESSMENT PAPER -2-SECTION .B.
  1. An electrical gadget can give an electric shock to its user under cert...

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  2. What preventive measure provided in a gadget can protect a person from...

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  3. Jatin puts a pencil into a glass container having water and is surpris...

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  4. Jatin puts a pencil into a glass container having water and is surpris...

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  5. Jatin puts a pencil into a glass container having water and is surpris...

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  6. With reference to the diagram given below, The equivalent resist...

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  7. With reference to the diagram given below, The reading of the am...

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  8. With reference to the diagram given below, The electrical power ...

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  9. Define the term refractive index of a medium. Can it be less than 1 ?

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  10. A coin placed at the bottom of a beaker appears to be raised by 4.0 cm...

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  11. What is the principle of method of mixture ? What other name is given ...

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  12. What is the other name given to it?

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  13. Name the law on which this principle is based.

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  14. From the diagram given below, answer the questions that follow: ...

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  15. From the diagram given below, answer the questions that follow: ...

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  16. From the diagram given below, answer the questions that follow: Wh...

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  17. A linear object is placed on the axis of a lens. An image is formed by...

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  18. When does the nucleus of an atom tend to be radioactive ?

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  19. How is the radioactivity of an element affected, when it undergoes a c...

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  20. State one use and one harmful effect of radioactivity.

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