'Bar' is the unit of: A. temperature B. heat C. atmospheric pressure D. current?

Option C is the correct answer.

Atmospheric pressure or in general pressure

Atmosperic Pressure is the correct answer.

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The bar is a unit of pressure defined as 100 kilopascals. It is about equal to the atmospheric pressure on Earth at sea level. Other units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb).

Correct answer is option C: atmospheric pressure

"Bar" is the unit of Pressure.

The unit of  Atmospheric Pressure is Bar

The bar is a metric unit of pressure,It is defined as exactly equal to 100,000 Pa, which is slightly less than the current average atmospheric pressure on Earth at sea level.

atomospheric pressure  thanks for the invite