Question

How do you convert $78631\,Pa$ to $kPa$ ?

Answer 1

Pressure is defined as thrust per unit area and therefore, pressure is directly proportional to thrust and inversely proportional to area. The SI unit of pressure is Pascal. It is denoted by the symbol $Pa$ . There are many other units in which pressure is measured like atm, Newton per square meter.

Complete step-by-step answer: The formula for calculating pressure is:
$P=\dfrac{F}{A}$
Where, $P$ is the pressure, $F$ is the force acting per unit area and $A$ is the area.
One Pascal is defined as the one Newton force applied on one square meter area.
$atm$ is defined as the unit of pressure which is a standard constant value used to measure the atmospheric pressure at sea level.
In this question, it is given that the pressure is equal to $78631\,Pa$
Here, we have to convert Pascal into kilopascal $(kPa)$
$1000\,Pa$ is equal to $1\,kPa$
$1\,Pa$ is equal to $\dfrac{1}{1000}kPa$
Hence, $78631\,Pa$ is equal to $\dfrac{78631}{1000}kPa$
$78631\,Pa$ is equal to $78.631\,kPa$

Additional information:
There are different types of pressure based on the reference pressure.
-Absolute pressure: It is defined as the pressure that is related to the reference pressure.
-Differential pressure: Differential pressure is the difference between two pressures.
-Atmospheric pressure: The pressure that is related to the atmosphere is known as atmospheric pressure.
-Gauge pressure: It is the difference between the absolute pressure and atmospheric pressure.

Note: We have concluded that the Pascal is the unit of pressure. We have converted Pascal into kilopascal. In this question, we have simply divided the value in Pascal by $1000$ to convert it into kilopascal. Pascal is equal to one Newton per meter square. Students can have a lot of problems during rounding off the number. Hence, detailed knowledge is required when solving these types of questions.