SI Units: Is the combination of SI units still an SI unit?

AI Thread Summary
N/m² is indeed a valid SI unit, representing pressure, and is commonly referred to as a pascal. While combinations of SI units can form new units, not all combinations have unique names or represent distinct physical quantities. The discussion highlights that while N/m² is a legitimate unit, it is essential to recognize that it specifically denotes pressure. The distinction between combinations of SI units and their assigned names is crucial for clarity in scientific communication. Overall, N/m² is an accepted SI unit, but its specific application as pressure is what defines its significance.
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Homework Statement


Is N/m^2 a si unit
I know Newton is and meters
but togeather are there
or is m^2

Homework Equations


The Attempt at a Solution


N/m^2
m^2
 
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Find out if N/m2 has been assigned another name in the SI.
 
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In general you can't assume a combination of SI units automatically makes another SI unit.

Newton is a force.
m2 is an area.
So a N/m2 is a unit of what?
 
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Newton per meter square
 
CWatters said:
In general you can't assume a combination of SI units automatically makes another SI unit.
Why not? Any combination of SI units is another SI unit. Whether it is the unit of something physical or has its own name is another question, but it is still in the realm of the system.
 
So what is the SI unit (singular) of torque? You can express torque in SI units (plural) but there isn't an SI unit of torque. That what I meant.
 
ipipi favour said:
Newton per meter square

The SI unit of pressure is the pascal.
 

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