Monday, October 18, 2021

Try these

  1. Would you weigh more or less at the equator than at the poles?
  2. Which planet moves around the sun at 67 thousand mph?
  3. 57.8 degrees C on Sept. 13, 1922, recorded in which place?
  4. Largest recorded earthquake mag 9.5 (Mw) May 22, 1960, where?
  5. What is a P wave?
  6. Door to Hell - which former Soviet state?
  7. Which columns did Johnson say were worth seeing but not going to see?

9 comments:

  1. 1 less - the earth is an oblate spheroid, so the surface is further from the centre at the poles.
    2. Is this us? Earth?
    3. Death valley, Ca??
    4. Iceland??
    5. Eathquake pressure wave, faster than S waves,
    6. ??
    7. Any??

    Another hopeful attempt Im afraid,

    Ian J

    ReplyDelete
  2. Replies
    1. 1. I stick with less, but it's because the surface is further from the centre at the equator! - I should read my own answers!

      Ian J

      Delete
  3. 2. This one.
    6. Gas crater Turkmenistan

    ReplyDelete
  4. Less at the equator, Earth, Libya, Chile, 5 yes, Turkmenistan, Giant's Causeway.

    A fine job done by both.

    ReplyDelete
  5. 1) I imaginé that the centrifugal force at the equator would have an effect top.

    ReplyDelete
  6. correct, gravity provides the centripetal force that overcomes a bodies inertia - unsure of the magnitude but will calculate later!

    Ian J

    ReplyDelete
  7. Have just done my sums and with gravity of 9.81N/Kg, centripetal force on equator is 0.0337N/Kg, so is very small compared to 'g'. I must have done this years ago, but it was interesting? to re-visit

    Ian J

    ReplyDelete
    Replies
    1. I've just thought - how fast would the earth have to spin to send us all flying off into space due to inertia? I'll have a go!

      Delete

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