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Give one application of echo....

Give one application of echo.

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It is used in SONAR, to find the distance of obstacle from the ship.
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ICSE-SAMPLE QUESTION PAPER 4 -SECTION B
  1. A cell is sending current in an external circuit. How does the termina...

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  2. Name the material used for filament of an electric bulb,

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  3. A ray of light travels from water to air as shown in the diagram given...

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  4. A ray of light travels from water to air as shown in the diagram given...

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  5. It is observed that: alpha particles and beta particles are defle...

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  6. It is observed that: gamma rays are not deflected by either an el...

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  7. How is the transference of heat energy by radiation prevented in a cal...

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  8. You have a choice of three metals A, B and C, of specific heat capacit...

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  9. A fuse is rated 8 A. Can it be used with an electrical appliance rated...

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  10. Name two safety devices which are connected to the live wire of a hous...

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  11. The diagram below shows a point source P inside a water container. Fou...

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  12. The diagram below shows a point source P inside a water container. Fou...

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  13. Among alpha, beta and gamma-rays, which is the most penetrating?

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  14. Arrange alpha , beta and gamma rays in ascending order with respect t...

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  15. Arrange the alpha, beta and gamma radiation in ascending order of thei...

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  16. State two factors on which the speed of a wave travelling in a medium ...

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  17. Give one application of echo.

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  18. A nucleus of stable phosphorus has 15 protons and 16 neutrons. (a) W...

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  19. A nucleus of stable phosphorus has 15 protons and 16 neutrons. (a) W...

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  20. A nucleus of stable phosphorus has 15 protons and 16 neutrons. (a) W...

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