Ep. 49 – Reality as Seen Through The Lens of Time

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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)

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