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  2. Europa (moon) - Wikipedia

    en.wikipedia.org/wiki/Europa_(moon)

    Europa's gravity is approximately 13% of Earth's. The temperature on Europa varies from −160 °C at the equator, to −220 °C at either of its poles. [145] Europa's subsurface ocean is thought to be significantly [clarification needed] warmer however. It is hypothesized that because of radioactive and tidal heating (as mentioned in the ...

  3. Gravity railroad - Wikipedia

    en.wikipedia.org/wiki/Gravity_railroad

    A gravity railroad (American English) or gravity railway (British English) is a railroad on a slope that allows cars carrying minerals or passengers to coast down the slope by the force of gravity alone. The speed of the cars is controlled by a braking mechanism on one or more cars on the train. The cars are then hauled back up the slope using ...

  4. Europa Clipper - Wikipedia

    en.wikipedia.org/wiki/Europa_Clipper

    Europa Clipper is designed to follow up on evidence for a subsurface ocean underneath Europa's ice crust, found using the Galileo spacecraft which orbited Jupiter from 1995 to 2003. Plans to send a spacecraft to Europa were initially conceived with projects such as Europa Orbiter and Jupiter Icy Moons Orbiter , in which a spacecraft would be ...

  5. Physics of roller coasters - Wikipedia

    en.wikipedia.org/wiki/Physics_of_roller_coasters

    As the car approaches a loop, the direction of a passenger's inertial velocity points straight ahead at the same angle as the track leading up to the loop. As the car enters the loop, the track guides the car up, moving the passenger up as well. This change in direction creates a feeling of extra gravity as the passenger is pushed down into the ...

  6. Total Control Racing - Wikipedia

    en.wikipedia.org/wiki/Total_Control_Racing

    The plastic track had two such lanes, and cars could change lanes with the flick of a switch on the controller. TCR sets came with "jam cars", a slow moving drone which both racers had to avoid crashing into. Like Matchbox's Powertrack, some cars featured lights. The first sets consisted of up to 4 Formula 5000 cars. The track (which stayed the ...

  7. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. What Is The Difference Between A Celery Stalk And A ... - AOL

    www.aol.com/difference-between-celery-stalk...

    A celery rib is one of the individual stems that make up the larger bunch of celery, or "stalk." In botanical terms, a rib is a single segment of the plant, and in culinary usage, it is the part ...

  9. Switchback Railway - Wikipedia

    en.wikipedia.org/wiki/Switchback_Railway

    For five cents, riders would climb a tower to board the large bench-like car and were pushed off to coast 600 ft (183 m) down the track to another tower. [5] The car went just over 6 mph (9.7 km/h). [5] At the top of the other tower the vehicle was switched to a return track or "switched back" (hence the name).