• 0 Posts
  • 386 Comments
Joined 1 年前
cake
Cake day: 2024年2月1日

help-circle








  • I remember when phones used to be good.

    Telemarketers have been around for a long, long time (Wikipedia claim “…the practice of contacting potential customers by telephone originated in the late 19th century.”).

    I personally recall a lot more telemarketing in the 90s, though I was a kid and just passed the phone to mom or dad. But that was also a time when caller ID was a luxury, and not everyone had answering machines.











  • Left pedal looks more like a dead pedal to me.

    And as others have said, change in direction is still acceleration. That’s part of Newton’s (apocryphal?) apple story — he witnessed an apple falling, and wondered why the moon doesn’t also fall. His amazing insight is that it does fall (accelerate), it’s just that it falls in such a way that it orbits, rather than hits, the Earth (for timescales relevant to a human).