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2 godz. temu · Eratosthenes estimated the distance between Earth and the Sun in the third century BC as "of stadia myriads 400 and 80000", the translation of which is ambiguous, implying either 4,080,000 stadia (755,000 km) or 804,000,000 stadia (148 to 153 million kilometers or 0.99 to 1.02 AU); the latter value is correct to within a few percent.
1 dzień temu · The concept of pedestrian crossings dates back to the early 20th century when traffic management became a significant concern in growing urban areas. ... Example Calculation. If the intersection distance is 20 meters and the pedestrian speed is 1.5 meters/second, the calculation would be: \[ \text{Time to Cross} = \frac{20}{1.5} \approx 13.33 ...
