Barometric Formula Isaac Physics

I have done part a and b, but I am unsure how to integrate to get partc. I am slightly confused about this step and Im not sure if my working is in the right direction?

EDIT Q LINK: https://isaacphysics.org/questions/rmets_barometric_formula?board=9508987c-b632-456f-b748-3783c5ecb32c&stage=a_level

(edited 2 months ago)

Reply 1

mosaurlodon

OP

10

My working (for part c)

Original post by mosaurlodon

I have done part a and b, but I am unsure how to integrate to get partc. I am slightly confused about this step and Im not sure if my working is in the right direction?

Original post by mosaurlodon

My working (for part c)

You are in the right direction except…

\dfrac{dP}{dz} = -\dfrac{PMg}{RT}

---------Eqn(1)

this is right :smile:

However, the next step is wrong. :frown:

Before, you do the integration, move the pressure term P on the right side to the left side while moving dz to the right side in eqn(1).

If you have a problem, watch the following video.
https://youtu.be/H1oKKXn5NsQ?si=qGOG37WjMAom4dy0

Original post by mosaurlodon

I have done part a and b, but I am unsure how to integrate to get partc. I am slightly confused about this step and Im not sure if my working is in the right direction?

I recommend that you post the link to the question in future to save the helper the trouble of searching for the question.

Reply 4

mosaurlodon

OP

10

Original post by Eimmanuel

You are in the right direction except…

\dfrac{dP}{dz} = -\dfrac{PMg}{RT}

---------Eqn(1)

this is right :smile:

However, the next step is wrong. :frown:

Before, you do the integration, move the pressure term P on the right side to the left side while moving dz to the right side in eqn(1).

If you have a problem, watch the following video.
https://youtu.be/H1oKKXn5NsQ?si=qGOG37WjMAom4dy0

Thanks for the video, I have followed the steps and have got this, but it doesn't give me the right answer on isaac, can you tell me whats going wrong here.

(edited 2 months ago)

Reply 5

mosaurlodon

OP

10

Original post by Eimmanuel

I recommend that you post the link to the question in future to save the helper the trouble of searching for the question.

Sorry editted the post, and will do from now on.

Reply 6

mosaurlodon

OP

10

Original post by mosaurlodon

Thanks for the video, I have followed the steps and have got this, but it doesn't give me the right answer on isaac, can you tell me whats going wrong here.