Air pressure is measured in kilopascals (kPa)

MATHEMATICS · Single correct · A Level · Mathematics · Quantities and units in mechanics · Quantities and units in mechanics

Problem

Air pressure

P(h)

is measured in kilopascals (kPa), and altitude

h

is measured in meters. A meteorologist reports

P'(h)\approx -0.12\ \text{kPa}/100\text{ m}

. What is this rate expressed in pascals per meter (Pa/m)? (Note:

1\ \text{kPa}=1000\ \text{Pa}

.) (a)

-0.0012\ \text{Pa/m}

(b)

-0.12\ \text{Pa/m}

(c)

-1.2\ \text{Pa/m}

(d)

-12\ \text{Pa/m}