You might wonder why a millibar isn't exactly 1/1000^thof an atmosphere. The unit is actually related to the old CGS units because atmospheric pressure is close to this unit. In CGS units 1 bar = 1000 dynes/cm². Pressure is often incorrectly reported as kg/cm², which is neither a legitimate pressure unit nor a standard SI unit pressure is force/unit area, and kg are a mass unit, and SI units never mix kg and cm.. So let's straighten out your friends on these units. Standard air pressure in this incorrect unit is 1.034 kg/cm². The weight of a kg at the earth's surface is 980,000 dynes. So what is standard air pressure in millibars?

Question

Quizplus · Accepted Answer

To convert the pressure from the incorrect unit of kg/cm² to millibars, we need to first convert it to dynes/cm² by multiplying it by 980,000 (the weight of a kg at the earth's surface in dynes) and then divide by 1000 to get millibars. 1.034 kg/cm² * 980,000 dynes/kg ÷ 1000 = 1013 mb Therefore, the best choice is A, 1013 mb.

You Might Wonder Why a Millibar Isn't Exactly 1/1000th of

You Might Wonder Why a Millibar Isn't Exactly 1/1000^thof