Jump to content

pmccarthy

Members
  • Posts

    3,466
  • Joined

  • Last visited

  • Days Won

    12

Everything posted by pmccarthy

  1. pmccarthy

    Brain Teaser

    fifteen
  2. The left side of the brain controls the right side of the body and vice versa. What we have in politics is a dedicated communist as prime minister. No need for further analysis.
  3. I was told there are two vaccines, a single shot and a two shot. When I had the single shot about two years ago I was told I would not need any boosters in future.
  4. Look up defenestration. It can mean sacking someone from a job, or throwing them out of a window. One word with two meanings, both appropriate.
  5. Another dead Putin man today, I reckon his circle will be thinking about how to get rid of him.
  6. Those of use with connections to gas wells or coal deposits will survive the freeze.
  7. pmccarthy

    Brain Teaser

    Refreshments will be served. (I think I am on a roll!)
  8. pmccarthy

    Brain Teaser

    Extravagant parties
  9. pmccarthy

    Brain Teaser

    This lacks a topic and a list of any unsuccessful choices of letters. Makes it too hard compared to earlier puzzles.
  10. The great Roman dictator had his name immortalised. Caesar became Kaiser, Czar, Tsar, Shah and a salad.
  11. To be fair, we were all wearing tinted safety glasses on that ute. Three of us in the front and five or six in the back (I took the photo).
  12. They pulled it out. I don't know whether it was fixed, I guess so because they had extensive workshops and lots of apprentices. We had to use big International utes after that. Here's a pic on the way to a job.
  13. pmccarthy

    Brain Teaser

    Chewy jerky
  14. Its just another dating service.
  15. I was working on a mine that used Mini Mokes for scouting around the lease. We had some empty bitumen lined overflow dams that were near the mill, and we used to take a shortcut through the dams. One day there was an overflow and the dam had a metre or so of water in it - my mate drove the Moke in without looking and it almost disappeared. I reckon just the windscreen was sticking out.
  16. There really aren't that many new sources of copper. The ones I have reported on all seem to have problems. Some have massive environmental impacts. Others, worldwide, have first nations objectors. There is a difference between a natural deposit in the ground, however massive, and a resource that can become an ore reserve. Trump seems to be finally overruling the objections to Resolution Copper in Arizona, but it will be the deepest large underground mine in the world and I expect there will be massive problems developing and operating it. It will be a Block Cave 2000 metres deep. Recent block caves by Rio Tinto have not gone well.
  17. "Your average EV has six times more mineral content than a petrol- or diesel-powered vehicle. All those metals need to be dug, scraped, blasted, or leached out of the earth. There is massive demand for batteries as countries eye up ambitious zero-emissions targets. But what's the cost?" This is the intro from an article in Business Insider. See The true cost of the global resource race to make electric car batteries While I expect most of the people here will leap to discredit MSN or the authors, please do some research first. Let me give you the true situation using copper as an example. This is based on my own data and calculations, so don't ask me for a reference. Minera Escondida operates two open pit copper mines in the Atacama Desert, 170 km southeast of Antofagasta in northern Chile. It is currently the highest producing copper mine in the world. I have been there. Construction of the mine started in 1988, which including the stripping of over 180 million tonnes of waste to get to the orebody. If we amortise that over the last 37 years, it is about 5 million tonnes per year. They mine about 340 million tonnes of rock (ore and waste) per year, so total mining including the pre-strip is 345 million tonnes. From this they produce 1.4 million tonnes of copper. So, they mine 246 tonnes of rock to get one tonne of copper. A Tesla model S contains 82 kg of copper, so it requires mining 20 tonnes of rock. And this is the highest producing mine, others are less efficient. Goldman Sachs are forecasting 73 million EV sales globally in 2040. This would require mining 1.46 billion tonnes of rock if all mining was as efficient as Escondida. And of course there are many other minerals involved. Nickel is currently in the news with Indonesia stripping vast areas of forest to strip-mine lateritic nickel. The madness has to stop before we destroy our planet.
  18. pmccarthy

    Brain Teaser

    My favorite hangout (American spelling!)
  19. My beetle could handle deep water if you hit it fast enough and aquaplaned across!
  20. Onetrack I was running a mine contracting business in the late 1980s (JARA mine construction) and we had similar problems. We dropped the contracting and went consulting. Over the next 30 years there were times I tried to borrow from banks but they wanted personal guarantees. Then when our business was booming they tried to lend us money but we didn’t need it.
  21. pmccarthy

    Brain Teaser

    JA3131
  22. pmccarthy

    Brain Teaser

    require...no double letters
  23. pmccarthy

    Brain Teaser

    D car
  24. One MW is a flow rate of power, 100 KWh is the stored quantity. The faster you want to fill it the more flow you need.
  25. Our forecast is one degree from now 8 pm until tomorrow morning.
×
×
  • Create New...