2 thoughts on “Can a ping pong ball knock down a wall?

  1. Vision Sky



    Man ‘knows’, which is why he is always two : his life and his knowing. Carlo Michelstaedter

  2. xileffilex

    UK Govt advice on Covid-19 last updated May 3 2020

    The transmission of COVID-19 is thought to occur mainly through respiratory droplets generated by coughing and sneezing, and through contact with contaminated surfaces. The predominant modes of transmission are assumed to be droplet and contact.

    Right, stay your distance! 2m please, no assuming, no thinking about it.

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