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Are Cats Liquid or Solid
Description
Cats are renowned for their uncanny ability to squeeze themselves into tight containers, a phenomenon that led physicist Marc-Antoine Fardin to investigate whether they could technically be defined as liquids. By applying the concepts of viscosity and the Deborah number, we discover how the state of matter depends not only on a substance's physical properties, but also on the duration of time over which it is observed.
Original title
האם חתול הוא נוזל או מוצק?
חתולים ידועים ביכולתם המופלאה להידחס לתוך מכלים צפופים, מה שהוביל את הפיזיקאי מארק אנטואן פארדין לבחון אם ניתן להגדירם כנוזל. בעזרת מושג הצמיגות ומספר דבורה, נגלה כיצד מצב הצבירה של חומר תלוי לא רק בתכונותיו אלא גם בפרק הזמן שבו אנו צופים בו.
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