Which statement correctly links standard sea level pressure to its units?

Which statement correctly links standard sea level pressure to its units?

• A. The standard sea level pressure is 29.92 inHg or 1013.25 mb
• B. The standard sea level pressure is 30.00 inHg or 1012 mb
• C. The standard sea level pressure is 29.50 inHg or 990 mb
• D. The standard sea level pressure is 31.00 inHg or 1050 mb

Answer: (A)

The value used as the standard sea level pressure is 1013.25 hectopascals (hPa), which is the same as 1013.25 millibars (mb), and it converts to 29.92 inches of mercury (inHg). This shows how different pressure units describe the same physical pressure: 1 hPa = 1 mb, and 1 inHg is about 33.8639 mb, so 29.92 inHg ≈ 1013.25 mb. The other options pair pressures with values that don’t match this exact standard reference, so they’re not correct representations of the standard sea level pressure.

The value used as the standard sea level pressure is 1013.25 hectopascals (hPa), which is the same as 1013.25 millibars (mb), and it converts to 29.92 inches of mercury (inHg). This shows how different pressure units describe the same physical pressure: 1 hPa = 1 mb, and 1 inHg is about 33.8639 mb, so 29.92 inHg ≈ 1013.25 mb. The other options pair pressures with values that don’t match this exact standard reference, so they’re not correct representations of the standard sea level pressure.