2 ms·

I don't get it. Is a tape measure invalid because height varies over the course of a day?

• pk-protect-ai 3y ago
  lol! Good one!!!!
• tomlin 3y ago
  Does a tape measure change?
  • thfuran 3y ago
    The measurement does.
    • tomlin 3y ago
      But the instrument for measuring doesn’t change. That’s what makes it dependable, predictable and something to measure against. You can’t measure against a moving target.