senglish
Oct 12, 2018

Designing and testing parachutes. A lesson in gravity and air resistance.

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senglish
Oct 12, 2018

 

 

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senglish
Oct 12, 2018

 

 

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senglish
Oct 12, 2018

 

 

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senglish
Oct 12, 2018

 

 

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senglish
Oct 12, 2018

 

 

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senglish
Oct 12, 2018

 

 

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senglish
Oct 12, 2018

 

 

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senglish
Oct 12, 2018

 

 

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