microbar
Học thuậtThân thiện
Definition
- Noun:
- A unit of pressure: A microbar is the absolute unit of pressure equal to one dyne per square centimeter. It is a metric unit used in scientific contexts to measure small pressures.
Usage
- The word microbar is a technical, scientific term. It is used almost exclusively in fields like physics, meteorology, and engineering to specify very low pressure values.
- It is a compound noun formed from the prefix "micro-" (meaning one millionth) and "bar" (a unit of pressure). Therefore, one microbar is one millionth of a bar.
- It is typically used with numerical values and in written, formal contexts rather than everyday conversation.
Examples
- Noun:
- The pressure change was a mere 10 microbars, detectable only by sensitive instruments.
- Standard atmospheric pressure is approximately 1,013,250 microbars.
Advanced Usage
- "Microbarograph": An instrument for recording very small changes in atmospheric pressure, often measured in microbars.
- The microbarograph recorded infrasound waves from the distant eruption.
Variants and Related Words
- Bar (n): A unit of pressure equal to 100,000 pascals. The microbar is a subdivision of this unit.
- Millibar (n): A more commonly used unit of pressure in meteorology, equal to one thousandth of a bar or 1,000 microbars.
- Pascal (n): The SI unit of pressure. One microbar is equal to 0.1 pascals.
Synonyms
- Dyne per square centimeter: This is the direct equivalent definition of a microbar, as one microbar equals one dyne per square centimeter. It is a synonym in terms of measurement.
Notes
- The microbar is not an SI unit. The pascal is the standard international unit for pressure.
- In practice, the millibar (mb) or hectopascal (hPa) is far more common in fields like weather reporting, though they are related (1 mb = 1000 microbars).
Noun
- the absolute unit of pressure equal to one dyne per square centimeter