You are viewing an obsolete version of the DU website which is no longer supported by the Administrators. Visit The New DU.
Democratic Underground Latest Greatest Lobby Journals Search Options Help Login

Reply #64: Without actually pulling out a calculator... [View All]

Printer-friendly format Printer-friendly format
Printer-friendly format Email this thread to a friend
Printer-friendly format Bookmark this thread
This topic is archived.
Home » Discuss » Archives » General Discussion (01/01/06 through 01/22/2007) Donate to DU
Gregorian Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Nov-24-06 10:40 PM
Response to Original message
64. Without actually pulling out a calculator...
Edited on Fri Nov-24-06 11:24 PM by Gregorian
1 No matter what you do, circumference is just the ratio of 2(pi)radius. When you do the math, it's surprising how big a change in radius that small addition makes.

Argh! I screwed up the last two.

Number two shows that I didn't understand Achimede's principal. Since the steel is heavier than water, it'll sink. But in the boat, since it's heavier than water, it would be able to displace more than it's own volume, due to the geometry of the boat. That is because the boat floats due to the fact that it incorporates enough air to make the entire structure lighter than the water that it displaces. Sheesh. It's been way too long since I've had to actually think about something other than George!

There's no way the third problem is a fixed leash. That's much too complex for just doing in one's head.

2 You haven't changed the mass in the swimming pool, whether the scrap iron is in the boat or in the pool. That's not really a good answer. It has more to do with the fact that it displaces as much water in the boat as out of the boat because it's more dense than water.

3 This is a good one. A 100 foot rope give the cow a 50 foot radius of grazing. Since the silo is also a 50 foot radius, it effectively cuts the cow's grazing area in half. Wrong. I just realized I didn't see this correctly.

Printer Friendly | Permalink |  | Top

Home » Discuss » Archives » General Discussion (01/01/06 through 01/22/2007) Donate to DU

Powered by DCForum+ Version 1.1 Copyright 1997-2002
Software has been extensively modified by the DU administrators

Important Notices: By participating on this discussion board, visitors agree to abide by the rules outlined on our Rules page. Messages posted on the Democratic Underground Discussion Forums are the opinions of the individuals who post them, and do not necessarily represent the opinions of Democratic Underground, LLC.

Home  |  Discussion Forums  |  Journals |  Store  |  Donate

About DU  |  Contact Us  |  Privacy Policy

Got a message for Democratic Underground? Click here to send us a message.

© 2001 - 2011 Democratic Underground, LLC