A certain location has barometric reading of 720 mm Hg and the gravitational acceleration is 9.2 m/s2 . If the temperature of mercury is 9 degree Celsius at which density is 12,850 kg/m3, compute the atmospheric pressure.

What have you done so far?

 

Why do you think this has anything to do with the First Law?

It has nothing to do with First law. Im sorry. Im deriving the formula for gravitational acceleration.

It would be less puzzling to us, and therefore easier to help you, if you explained further.

 

Your original question specifically asks for the atmospheric pressure. What do you think this has to do with gravitational acceleration?

Im sorry. Im deriving the formula for gravitational acceleration.

 

In this thread I showed how to measure gravitational acceleration, at home doing experiment:

http://www.scienceforums.net/topic/84336-if-pi-ratio-was-squared-and-98-mss-how-would-this-change-the-whole-of-science/?p=815752