Barometric Pressure

Furthur to my recent question and thank you Bob.

Had the 32 feet being 33 feet I would have considered this close enough to 10m.

However I now understand there are many answers to the question of the decrease in barometric pressure with height all probably correct. Taking the mean barometric pressure at sea level and at the top of Everest I concluded that a decrease in the order of 85mb per Km was about right. Although I now realise it will not be correct to divide the difference in mb by the ht in Km to arrive at a decrease that will be correct at all altitudes under all circumstances.

The figure I found on the internet of 100 mb per Km may well be correct from sea level up to 1Km in ht but for a different altitude say between 9 Km and 10 Km a figure of 75 mb per Km might be more accurate. (or is it the other way round)

Anyone ant ideas?

Thank you,


Since this is not my area of expertise, I searched Google under the key words "'barometric pressure' altitude" to get these possible sources:

I hope this helps. Thanks for asking.

The problem you are faceing is this:
Trying to reduce a complicated model of reality to a rule of thumb always leads to exceptions. No matter what rule you choose, (10km per 75mb), you will find it is only a guide.

  1. 👍
  2. 👎
  3. 👁

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math plz help someone.

    Which of the following is a possible measure of the area of a square rug? • 18 square feet • 24 square feet • 36 square feet • 48 square feet Based on your answer to the previous question, what would the length of one side

  2. Math

    Which number is irrational? 3/17 √25 0.6.....( the dots mean it go on forever) √33*** Which numbers are rational? Select all that apply. 3.14**** √50 2.3**** √144 Which of the following is a possible measure of the area of

  3. Calculus

    A rectangular trough is 8 feet long, 2 feet aross the top and 4 feet deep, if water flows in At a rate of 2 cubic feet per minute. How fast is the surface rises when the water is 1 feet deep.?

  4. Math

    From a boat on the lake, the angle of elevation to the top of a cliff is 26°35'. If the base of the cliff is 85 feet from the boat, how high is the cliff (to the nearest foot)? A. 56 feet B. 43 feet C. 53 feet D. 46 feet I HAVE

  1. Geometry

    In baseball, the length of the path between each pair of consecutive bases is 90 feet. The paths form right angles. How far does the ball need to travel if it is thrown from home plate directly to second base? A. 90 feet B. 127.3

  2. Math

    The area of a circle is 78.5 square feet. What is the circumference? Select all that apply. 5 π feet 10 π feet 20 π feet 15.7 feet 31.4 feet 62.8 feet

  3. Math

    1. To find the height of a pole, a surveyor moves 120 feet away from the base of the pole and then, with a transit 8 feet tall, measure the angle of elevation to the top of the pole to be 36*. to the nearest foot, what is the

  4. Math

    How much fencing is needed to enclose a circular pond with diameter 12.5 feet? A. 37.5 feet **? B. 19.625 feet C. 78.5 feet D. 39.25 feet

  1. Math

    A square field has an area of 22,500 square feet. To the nearest foot, what is the diagonal distance across the field? F. 150 feet G. 178 feet H. 191 feet I. 212 feet J. 260 feet

  2. math

    What is the surface area in square feet of a rectangular prism with dimensions of 2 feet by 3 feet by 4 feet as shown in the net?

  3. Math

    The ramp shown below is used to move crates of apples to loading docks at different heights. When the horizontal distance AB is 12 feet, the height of the loading dock, BC, is 6 feet. What is the height of the loading dock DE? 10

  4. math

    James attached a diagonal brace a rectangular frame that measures 6 feet by 8 feet. What is the length of the diagonal brace? A. 2 feet B. 10 feet C. 14 feet D. 48 feet i think it is D

You can view more similar questions or ask a new question.