Problem solved!! (just ignore)

[alanhall4]

Thanks for the help.

 

[dighn]

.

 

[alanhall4]

Thanks. I'm just having trouble finding the mass. I understand the density formula, and how to get the volume.

 

[glugglug]

Hint is in bold:

The standard kilogram is a platinum-iridium cyclinder 39.0mm in height and 39.0mm in diameter. What is the density of the material?

I'm having trouble finding the mass of the cylinder.

 

[dighn]

The standard kilogram is a platinum-iridium cyclinder 39.0mm in height and 39.0mm in diameter. What is the density of the material

 

[jagr10]

Originally posted by: dighn

The standard kilogram is a platinum-iridium cyclinder 39.0mm in height and 39.0mm in diameter. What is the density of the material

 

[rgwalt]

Originally posted by: dighn

The standard kilogram is a platinum-iridium cyclinder 39.0mm in height and 39.0mm in diameter. What is the density of the material

Tuesday night brain-fart... Standard kilogram... Hmmm...

Ryan

 

[alanhall4]

Thanks a lot, but now I feel like an idiot. I just overlooked that first part I guess. I don't know what I was thinking. Thanks again for the quick replies.

 

[glugglug]

Actually.... this MAY be a trick question I would check the answer based on density and volume = h ¶ r^2

There was an article in the New York times today about how they need to create a new "standard kilogram" because the cylinder they used before has mysteriously lost 50 micrograms compared to other measures.

Edit: had sphere volume formula there before the new weight they are proposing as a kg is a sphere instead of a cylinder.

 

[Martin]

Originally posted by: dighn
umm...

density = mass / volume

volume of cylinder = pi*radius^2*height

 

[dighn]

nm

 

[ROTC1983]

Originally posted by: alanhall4
Thanks for the help.

No problem