Didrachma (Biblical Greek)
The didrachma was an ancient Greek silver coin used during Biblical times, valued at two drachmas (the name means “two drachmas”). It was half the value of the more common tetradrachma.
The didrachma was widely circulated for trade and everyday transactions in Greek and Biblical regions. It typically weighed around 8.5 grams of silver.
This coin played an important role in the economy of the ancient Mediterranean world, appearing in historical and Biblical accounts.
Summary:
Ancient Greek silver coin worth 2 drachmas
Weighed about 8.5 grams of silver
Used in trade during Biblical and classical Greek periods
It looks like you mentioned "pound-force square second per foot". This is a compound unit that can be broken down into:
pound-force (lbf): a unit of force
square second (s²): time squared
per foot (ft⁻¹): per unit length
What does this unit represent?
It could be a unit for something like mass or inertia-related quantities in imperial units, depending on context. For example, it might show up in equations involving force, time, and length — possibly in mechanics or engineering.
To understand or convert it:
Pound-force (lbf) is a force unit, where:
1lbf=4.44822N
Second squared (s²) is just time squared.
Foot (ft) is length:
1ft=0.3048m
Example usage
If you want to convert pound-force square second per foot (lbf⋅s2/ft) into SI units:
lbf⋅s2/ft→Newton⋅s2/meter
Since
1lbf=4.44822N,1ft=0.3048m
1ftlbf⋅s2=0.3048m4.44822N⋅s2≈14.6mN⋅s2
Could you tell me more about where or how you want to use this unit? That would help me give a more specific explanation or conversion!