LiveWire Network Peer Answers Peer Support Teen Forums Tech Forums College Forums 324 users online 221647 members 403 active today Advertise Here Sign In
TeenCollegeTechPhotos | Quizzes | LiveSecret | Memberlist | Dictionary | News | FAQ
Member Spotlight
richiewalker
Livewire's personal Barman.
Mood: Hopeless
You have 1 new message.
Emergency Help
Until you sign up you can't do much. Yes, it's free.

Sign Up Now
Membername:
Password:
Already have an account?
Invite Friends
Active Members
Groups
Contests
Moderators
2 online / 21 MPM
Fresh Topics
  LiveWire / College Forums / Classes & Exams / Viewing Topic

Physics, Density.
I'm stuck and really need help!
Replies: 8Last Post Aug. 24, 2008 11:14am by ElephantStone
Welcome to LiveWire!
We're Stronger Together.
Join the Community
Single page for this topic Email Print Favorite
( woolo )


Quality Control Engineer
Reply
I'm stuck on a physics question, any help would be great!

A cylindrical cone of semi-angle α, height H and mass M is submerged in a fluid of density ρ. Givecn that the volume of a cone is 1/3 area of base x height, find the depth to which it is submerged.

Any ideas?


10:53 am on Aug. 24, 2008 | Joined: April 2006 | Days Active: 67
Join to learn more about woolo United Kingdom | Straight Male | Posts: 834 | Points: 929
LiveWire Humor
Post from this position was omitted due to content violations
Post from this position was omitted due to content violations
Post from this position was omitted due to content violations
( woolo )


Quality Control Engineer
Reply
I guess the answer should be in algebra form. I just realy don't know what it's asking me.

10:58 am on Aug. 24, 2008 | Joined: April 2006 | Days Active: 67
Join to learn more about woolo United Kingdom | Straight Male | Posts: 834 | Points: 929
BodomChick


Wealthy Hobo
Reply
that's rather difficult.

-------
It's the rich man's war but the poor man's fight.

11:02 am on Aug. 24, 2008 | Joined: June 2008 | Days Active: 237
Join to learn more about BodomChick England, United Kingdom | Straight Female | Posts: 2,853 | Points: 5,403
Violently Happy


Enlightened One
Reply
Don't you have notes that could help you?

-------
Give a man a fire, and he is warm for a day.
Set a man on fire, and he is warm for the rest of his life.

11:05 am on Aug. 24, 2008 | Joined: Dec. 2006 | Days Active: 634
Join to learn more about Violently Happy Serbia | Posts: 9,598 | Points: 16,636
( woolo )


Quality Control Engineer
Reply
No sadly all the notes i have include mass as a variable. However this does not include any hint to the mass of the object. :(

11:06 am on Aug. 24, 2008 | Joined: April 2006 | Days Active: 67
Join to learn more about woolo United Kingdom | Straight Male | Posts: 834 | Points: 929
ElephantStone


Visionary

Patron
Reply
Lets think...what is density...density is the amount of matter in an object, if Im correct so that is the volume of the cone which is (1/3)(pie.r^2)(H)....

There are 2 things that can happen: the cone can sink, or float, depending on whether it is less dense or more dense than the fluid...

So (1/3)(pie.r^2)(H)>p

Now thats a test, lets see if it can be proved...

archimedies principle applies here I think..

well change density to pressure

(1/3)(pie. r^2) H = row.g.H

cancelt he Hs

(1/3)(pie.r^2)=row.9.8

(pie.r^2)/row=9.8/1.333
ditto            =7.351


I lost myself now, but it goes something liek that Im sure. Hopefully my notes might be of some use. Ill come back later and try.

-------

Punctured bicycle on a hillside, desolate,
Could nature make a man of me yet?


11:14 am on Aug. 24, 2008 | Joined: Aug. 2007 | Days Active: 567
Join to learn more about ElephantStone England, United Kingdom | Straight Male | Posts: 10,430 | Points: 8,022
Single page for this topic Email Print Favorite

Quick Reply

You are signed in as our guest.

Looking for something else?
 

  LiveWire / College Forums / Classes & Exams / Viewing Topic