Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
rosho
Group Title
how do you solve this
The pressure of earth's atmosphere at sea level is approximately 1000 millibars and decreases exponentially with elevation. At an elevation of 30,000ft, the pressure is onethird of the sea level pressure. At what elevation is the pressure half of the sealevel pressure? At what elevation is it 1% of the sealevel pressure?
 one year ago
 one year ago
rosho Group Title
how do you solve this The pressure of earth's atmosphere at sea level is approximately 1000 millibars and decreases exponentially with elevation. At an elevation of 30,000ft, the pressure is onethird of the sea level pressure. At what elevation is the pressure half of the sealevel pressure? At what elevation is it 1% of the sealevel pressure?
 one year ago
 one year ago

This Question is Open

rosho Group TitleBest ResponseYou've already chosen the best response.0
dw:1365051172238:dw
 one year ago

rosho Group TitleBest ResponseYou've already chosen the best response.0
that's already done for us.
 one year ago

rosho Group TitleBest ResponseYou've already chosen the best response.0
1000 milibars
 one year ago

nincompoop Group TitleBest ResponseYou've already chosen the best response.1
okay I am used to the atm or pascal. 1 atm is 760 torr and 1 bar is 750 torr if we have 1 bar at sealevel and 1/3 at 30,000 ft, then look for the elevation where it is 1/2 or 50% do you want to set up a dimensional analysis?
 one year ago

rosho Group TitleBest ResponseYou've already chosen the best response.0
this is a calc 2 question, but it's more physics related so i thought i tried.
 one year ago

nincompoop Group TitleBest ResponseYou've already chosen the best response.1
you don't need calculus for this
 one year ago

rosho Group TitleBest ResponseYou've already chosen the best response.0
sure, just go ahead and do it your way. i'll compare it to the answer i have in the book.
 one year ago

rosho Group TitleBest ResponseYou've already chosen the best response.0
because i don't understand this problem at all.
 one year ago

rosho Group TitleBest ResponseYou've already chosen the best response.0
don't bother i'm just going into my tutoring session and asking the tutor. because i just don't understand it. thanks for trying.
 one year ago

gleem Group TitleBest ResponseYou've already chosen the best response.2
The above answer is not correct. The problem states that the pressure decreases exponentially with height. that means tha\[p=p _{0}e ^{\alpha h}\] where po is the pressure at sea level and h is the height aboce sea level and alpha is a constant which we determine from the info provided above. If we take the logrithm of the equation above we get \[\log p=\log p _{0}  \alpha h \] or \[\log(p/p _{0} ) = \alpha h \] Use the info that at 30000 ft the pressure is 1/3 of 1000mb to find alpha. Then for p/p0 = 0.50 solve for h with the alpha you determined and the same for p/po = 0.01. OK?
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.