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स्वागत गीत : अथ स्वागतम् शुभ स्वागतम् (Ath Swagatam Shubh Swagatam)

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स्वागत गीत : अथ स्वागतम् शुभ स्वागतम् (Ath Swagatam Shubh Swagatam)  अथ स्वागतं शुभ स्वागतम्  स्वागतम् । अथ स्वागतं शुभ स्वागतम् । आनंद मंगल मंगलम् । नित प्रियं भारत भारतम् ॥ ध्रु.॥ नित्य निरंतरता नवता मानवता समता ममता सारथि साथ मनोरथ का जो अनिवार नहीं थमता संकल्प अविजित अभिमतम् ॥ १॥ आनंद मंगल मंगलम् । नित प्रियं भारत भारतम् । अथ स्वागतं शुभ स्वागतम् ॥ कुसुमित नई कामनाएँ सुरभित नई साधनाएँ मैत्रीमात क्रीडांगन में प्रमुदित बन्धु भावनाएँ शाश्वत सुविकसित इति शुभम् ॥ २॥ आनंद मंगल मंगलम् । नित प्रियं भारत भारतम् । अथ स्वागतं शुभ स्वागतम् ॥

Ncert Solution class 9 Science chapter 11 Sound - Param Himalaya

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Ncert Solution Class 9 Science Chapter 11 Sound - Param Himalaya  Page 129 1. How does the sound produced by a vibrating object in a medium reach your ear? Solution: When a body vibrates the air in its neighborhood is alternately compressed and rarefied. The compressed air has higher pressure than surrounding air. It therefore pushes the air particles near it causing compression to move forward. A rarefaction or low pressure is created at the original place. These compressions and rarefaction causes particles in the air to vibrate about their mean position. The energy is carried forward in these vibration. This is how sound travels . 2. Explain how sound is produced by your school bell.  Solution: When the school bell vibrates, it pushes the adjacent particles of air to vibrate. This causes the disturbance in the wave when the bell moves forward it pushes the air particles in front of it and creates a region of high pressures known as compression and when the bell moves backwa...

Free Download book Ncert Class 9 science chapter 11 Sound in Pdf - Param Himalaya

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 Free Download NCERT Class 9 science chapter 11 Sound in Pdf - Param Himalaya