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   comp.sys.raspberry-pi      Raspberry Pi computers & related hardwar      26,127 messages   

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   Message 24,346 of 26,127   
   Ahem A Rivet's Shot to Jim H   
   Re: Need help with PI PICO...   
   26 Mar 24 18:16:22   
   
   From: steveo@eircom.net   
      
   On Tue, 26 Mar 2024 17:33:50 +0000   
   Jim H  wrote:   
      
   > Assuming the "oil" you're talking about is kerosene/heating fuel, the   
   > speed of sound is 1330 m/sec so 0.5cm takes 3.76 micro-sec.   
      
   	I would have thought it's measuring the distance to the surface of   
   the oil from above the oil so it would be the speed of sound in air that   
   matters 300m/s.   
      
   --   
   Steve O'Hara-Smith   
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