Convert 661,000 pascal, pa into torr: 1atm = 760 torr = 760 mmHg = 101,325 pa 101.325 kpa 1.01325 barr 14.696 p.s.i. 29.921 inHg (inHg and p.s.i. are approximations of the metric pressures and are subject to significant figures)
The Correct Answer and Explanation is:
To convert 661,000 pascal (Pa) to torr, we use the known conversion factor: 1 atmosphere (atm) = 760 torr = 101,325 Pa
First, determine how many atmospheres 661,000 Pa equals: 661,000 Pa ÷ 101,325 Pa/atm = 6.521 atm
Now, convert atmospheres to torr: 6.521 atm × 760 torr/atm = 4,957.96 torr
Thus, 661,000 Pa is approximately 4,957.96 torr.
Explanation
Pressure conversions are essential in science and engineering for comparing measurements across different systems. The pascal is the SI unit for pressure, commonly used in physics and engineering. Torr is a unit used mainly in vacuum science and meteorology, derived from the millimeter of mercury scale, which was historically used in barometry.
The atmospheric pressure at sea level is approximately 101,325 Pa, which is defined as one atmosphere. Because torr is directly linked to atmospheric pressure, one atmosphere is equivalent to 760 torr. The conversion method follows a logical sequence by first transforming pascal into atmospheres, then converting atmospheres to torr.
This process ensures accuracy while keeping calculations manageable. The approach of using an intermediate step—atmospheric pressure—is particularly useful because it aligns with many engineering equations and laboratory measurements. Scientists and engineers use these conversions when dealing with air pressure, vacuum conditions, and fluid dynamics.
Applying this method allows for precise calculations in real-world applications such as meteorology, material science, and medical devices. The final answer, 4,957.96 torr, provides an equivalent pressure measurement that aligns with practical use cases in vacuum technology, aerospace systems, and pressure-sensitive equipment.
