Monday, May 16, 2022

Try these

  1. How many decibels to create a black hole?
  2. How many decibels before it's no longer 'sound'?
  3. How loud was Krakatoa in db?
  4. 500mph tsunami slows to how fast at the shore?
  5. 174mph Guinness record for which vehicle? Who?
  6. 27.44mph WR for which creature?
Inflicted on you by on

11 comments:

  1. Ian JMonday 16 May 2022 at 17:12:00 GMT+1

    #1. doesn't a black hole absorb everything around it? Would there be any sound?
    #2 anything above 85dB is bad - upper limit on scale is 140dB
    #3??
    #4. depends on height of wave - If 30', speed would be about 1/10 - 50mph?
    #5. Thrust 2? Richard Noble?
    #6. 100m/9s = 27ish mph Usain Bolt?

    ReplyDelete
  2. AnonymousMonday 16 May 2022 at 17:26:00 GMT+1

    Robbo:
    6. Fully laden swallow

    ReplyDelete
  3. James HighamMonday 16 May 2022 at 17:31:00 GMT+1

    1. No sound after, very loud to create it.
    2. 194db is held to be around the point.
    3. Well over 230db.
    4. Half the height, Usain Bolt speed.
    5. Bicycle. Name?
    6. Bolt, yes.

    ReplyDelete
    Replies
    1. Ian JMonday 16 May 2022 at 17:40:00 GMT+1

      #1. If Krakatoa was 230dB (log scale), then 1000dB would be about 8 times louder - anywhere near?
      #5. Not Mark cavedish, unfortunately

      Delete
    2. Ian JMonday 16 May 2022 at 20:37:00 GMT+1

      I should have said 100 times louder - mixing up 2's & 10s again

      Delete
  4. James HighamMonday 16 May 2022 at 18:08:00 GMT+1

    Around 1100db and https://www.bicycling.com/news/a23281242/denise-mueller-korenek-breaks-bicycle-speed-record/

    Flat surface, unassisted – Male record for regular cycling without pace car is held by Sebastiaan Bowier with the speed of 133.75 km/h in 2013. Female record is held by Barbara Buatois with 121.81 km/h in 2010.

    ReplyDelete
  5. DoonhamerMonday 16 May 2022 at 19:17:00 GMT+1

    dB is just a ratio. So what percentage makes a black hole.
    Tsunami. It's a wave. In deep sea the surface water just goes up and down. What a wave, and the water in it, does when it comes to increasingly shallow water depends on the slope of the sea bottom and what it is made off - rock, pebble or sand. If it hits a cliff rising from deep water the wave will just reverse with same amplitude. A total speed reversal. On a sloping beach the water wave will gradually reach zero velocity.

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  6. DoonhamerMonday 16 May 2022 at 19:19:00 GMT+1

    Fastest outboard motor boat. A guess given nautical topic.
    Therefore last one must be a sea creature. A penguin? A shark?

    ReplyDelete
  7. deariemeMonday 16 May 2022 at 22:28:00 GMT+1

    We had our first strawbs from the garden at dinner. A little under-ripe but we thought we'd eat them before Mr Fox took them. Deeeeelish.

    ReplyDelete

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