1 psi equals:

The correct choice is based on the conversion relationship between psi (pounds per square inch) and kilopascals (kPa). One psi is approximately equal to 6.89 kilopascals, which is a commonly used conversion factor in pressure measurement. This means that for every pound of force applied on an area of one square inch, the pressure exerted is equivalent to about 6.89 kPa.

Understanding this conversion is crucial for engineers, particularly when working with systems that operate under different pressure units. In practical applications, knowing how to convert psi to kPa can aid in calculations and ensure proper operation of equipment designed to specific pressure ratings.

The other options represent incorrect conversions of psi. One kilopascal does not equal one psi, as the numerical value does not match. Thus, this conversion is either too low or misrepresented compared to the actual psi to kPa conversion. Similarly, 100 kPa significantly exceeds the value of 1 psi, and one newton per square meter is a much smaller unit of pressure, further distancing it from the correct value corresponding to psi. Therefore, the understanding of pressure units and their conversions is vital for those studying in this field.