Feb 27 2020
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Links
- Antipodes (Wikipedia)
- Antipodes Finder (Antipodes Map)
- How Long To Fall Through The Earth? – Minute Physics (YouTube)
- Gravity Train (Wikipedia)
In reality, there are two reasons gravity trains do not exist. First, a lengthy transit distance would pierce the Earth’s mantle and traverse a region where rock is more fluid than solid. No materials are known that would withstand the tremendous heat and pressure in the inner core. Temperature is estimated as 5,700 K (5,430 °C; 9,800 °F), and pressure as high as about 330 to 360 gigapascals (3,300,000 to 3,600,000 atm). Secondly, frictional losses would be significant. Rolling friction losses could be reduced by using a magnetically levitated train. However, unless all air is evacuated from the tunnel, frictional losses due to air resistance would render the gravity train unusable. Evacuating the atmosphere to make it a vactrain would eliminate this drag but would require additional power. Such objections would not apply for solid planets and moons that do not have an atmosphere.
- Tie Me Kangaroo Down, Sport by Rolf Harris 1963 (YouTube)
- Captain Kangaroo (Wikipedia)
- They Call Me Mister Tibbs! (Wikipedia)
- Nippers - Bondi Surf Bathers Life Saving Club (Bondi Surf Club)
- Bill Maher smoking pot (YouTube)
- Trump releases birth certificate to Bill Maher, demands $5M (Yahoo News)
- Mike Bloomberg meatball tweet (Twitter)
- The Fashion Institute Of Technology Put Two Top Officials On Leave Over A Runway Show People Are Calling Racist (BuzzFeed News)