SailNet Community - View Single Post - 100 lb of Lead Vs 100 lb of concrete
View Single Post
  #8  
Old 04-20-2013
SlowButSteady's Avatar
SlowButSteady SlowButSteady is offline
Senior Slacker
 
Join Date: Feb 2010
Location: SoCal
Posts: 4,223
Thanks: 0
Thanked 17 Times in 15 Posts
Rep Power: 5
SlowButSteady is on a distinguished road
Re: 100 lb of Lead Vs 100 lb of concrete

Think of it this way:

1000 liters of sea water: apparent weight in air = 1025 kg; apparent weight in seawater = 0 kg
1000 liters of concrete: apparent weight in air = 2400 kg; apparent weight in seawater = 1475 kg
1000 liters of iron: apparent weight in air = 7874 kg; apparent weight in seawater = 6849 kg
1000 liters of lead: apparent weight in air = 11340 kg; apparent weight in seawater = 10315 kg

- apparent weight in seawater is (density*volume) - (seawater density*volume);
- numbers are approximate, depending on salinity and the concrete mix;
- apparent weight in air and apparent weight in a vacuum are virtually identical, as air has a density of only about 1.3 kg/1000 liters)
__________________
Never forget them. Do something to prevent it from happening again.
Charlotte Bacon, Daniel Barden, Rachel Davino, Olivia Josephine Gay, Ana M. Marquez-Greene, Dylan Hockley, Dawn Hochsprung, Madeleine F. Hsu, Catherine V. Hubbard, Chase Kowalski, Jesse Lewis, James Mattioli , Grace McDonnell, Anne Marie Murphy, Emilie Parker, Jack Pinto, Noah Pozner, Caroline Previdi, Jessica Rekos, Avielle Richman, Lauren Rousseau, Mary Sherlach, Victoria Soto, Benjamin Wheeler, Allison N. Wyatt

Last edited by SlowButSteady; 04-20-2013 at 09:21 PM.
Reply With Quote Share with Facebook