Problem: A NASA spacecraft measures the rate R of at which atmospheric pressure on Mars decreases with altitude. The result at a certain altitude is: R = 0.0272 kPa•km-1 Convert R to kJ•m-4.

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We’re being asked to convert the units of R from kPa • km–1 to kJ • m–4


Let us first convert kPa to Pa and km to m. We need the following conversion factors for this:

1 km = 103 m          1 kPa = 103 Pa          1 Pa = 1 N • m–2


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Problem Details

A NASA spacecraft measures the rate R of at which atmospheric pressure on Mars decreases with altitude. The result at a certain altitude is: 

R = 0.0272 kPa•km-1 

Convert R to kJ•m-4.


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