Computing pressure?

hi! plz help me with my homework, the question is...
the barometer of a mountain hiker reads 93 mbars at the beginning of a hiking trip and 780 mbars at the end. neglecting the effect of altitude on local gravitational acceleration, determine the vertical distance climbed. Assumed average air density of 1.18kg/m^3 and take g= 9.7 m/s^2. plz provide me the solution, the answer is 1289 meter,thank you!

Normally, you would use the barometric formula. Because you mention "average" you may be doing something different. Try this.

z*density*g=930 millibars-780 millibars (make sure you convert to Pascal)

z = 1311 m

This is close to your 1289 m. That is the best I can do given your data. If you use g = 9.807 m/s^2 you get 1296 m, which is closer.
h x air density x g = ( p1 - p2 ) x 10^-3 x 1.0197
where ,
h = elevation difference in m.
p1,p2 = barometer reading at beginning and at end of hike in mbar

The answers post by the user, for information only, FunQA.com does not guarantee the right.

More Questions and Answers:
• What does a capacitor of 1 farad or 1000 microfarad mean? how much volt or ampere would those handle?
• What are the differences between BJTs and FETs?
• How can we allocate dynamic arrays in R or S-plus?
• Undersea robot... Marine Technologies?
• Stainless steel ball valve that can with stand to acid supliers ?
• What is mist lubrication?
• My rank in aieee is 119638 (air) and 2332 (uttarakhand) will i get any good engineering collage in councelling
• Can you explain to me how a ROCKET WORKS?? thanks?
• I need a way to build a robot from an old RC car?