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The pitch is the characteristic of sound that enables us to distinguish between a flat sound and a shrill sound.
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The voice of a female has a lower pitch than a male.
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On which factor pitch of the sound depends?
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How artificial magnets are produced?
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Name the strongest and the most powerful magnets on the Earth.
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Name the most commonly used permanent magnet.
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Write a note on magnetoreception.
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Give some examples of artificial magnets.
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Name the principle which is used in rocket propulsion.
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Explain the launching of a satellite in a particular orbit.
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Name the two elements which are derived from the country.
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Reason out
Elements are called semimetals.
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An atom differs from its ion in ______.
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A proton can be defined as a ______.
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Assertion: Proton can be defined as a hydrogen ion (H+).
Reason: These photons are produced when one electron is removed from one hydrogen atom.
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What are fluorescent materials?
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An atom is electrically neutral. Give reason.
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Aquatic plants make use of dissolved ______ for photosynthesis.
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Explain the importance of dissolved salts in water.
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Take two pots with similar plants. Water one of the plants with tap water and the other with seawater. Record your findings and note the difference observed.
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