Phys 2211 Question

breezie

OSNN Addict
Joined
Jan 6, 2004
Messages
126
#1
The density of aluminum is 2.70x10^3 km/m^3, the density of iron is 7.86x10^3 kg/m^3. Find the radius of a solid iron sphere that balances a solid aluminum sphere of radius 2.86cm on an equal-arm balance.


my work:

(4/3)(pi)(.286m)^3 = .000098m^3 for volume X weight = .264576kg

.264576/7.86x10^3 = .000034

(4/3)(pi)(RADIUS)^3 = .000034

Radius = .020029945725539 blah blah METERS--


can someone help check this for me? (remember to covert cm to m!)
 
Joined
Jan 31, 2003
Messages
364
#2
EDIT: nvm, not as hard as i thought when i first glanced at it...but still dont know the answer cause im too lazy to figure it out...
 

Members online

No members online now.

Latest posts

Latest profile posts

Perris Calderon wrote on Electronic Punk's profile.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS

Been running around Quora lately, luv it there https://tinyurl.com/ycpxl
Electronic Punk wrote on Perris Calderon's profile.
All good still mate?
Hello, is there anybody in there? Just nod if you can hear me ...
Xie
What a long strange trip it's been. =)

Forum statistics

Threads
62,000
Messages
673,428
Members
89,025
Latest member
Haniew