## Water if life. What would life be like with less water?

What would happen to earth if we suddenly had 10% less water? The mass of the planet would change, so would our orbit? Would weather and seasons change? Would it affect tides and the moon? At what point would we begin to suffer? Is it 10% or 20% or 50%?
posted by krautland on Nov 7, 2015 - 7 answers

## Water physics

Earlier today I was warming up a test tube in chem lab by placing its bottom in a warm stream of water from a faucet and I noticed something peculiar; the stream of water seemed to capture the test tube and hold it in place.
posted by aldurtregi on Mar 30, 2015 - 4 answers

## Convert water measurement into speed measurement?

I have a hose that can put out water at 60 litres per second (16 gallons per second) and I want to know if this hose can roughly replicate a wind speed of 275 kilometres per hour (170mph). We will put an object right in front of the hose - so there will be little pressure fall-off from the hose. Is this conversion measurement at all possible? I don't mind if the answer is a little approxiamate.
posted by meech on Oct 5, 2014 - 22 answers

## Poo vs Gravity

As a by-product of this FPP about a very large water slide, have just been involved in an inconclusive and heated argument about the physics aspects. Hypothetically, what would happen if, halfway down this very fast waterslide in a raft, you (accidentally or deliberately, it doesn't matter) defecated?
posted by Wordshore on May 20, 2014 - 13 answers

## How to draw the vectors for cohesive forces and adhesive forces?

How does the adhesive force between the water and the material of the capillary tube exert an upwards force to create the concave meniscus shape of H2O (or the convex meniscus shape of Hg)?
posted by sunnychef88 on Jul 8, 2013 - 3 answers

## What volume of 14 C water do I need to add to 30 L of 24 C water to have a product of water at 20 C?

What volume of 14 C water do I need to add to 30 L of 24 C water to have a product of water at 20 C? Is there an easy calculation for this sort of thing so that I can do this with different levels of water and/or temperature differences?
posted by pwb503 on Oct 19, 2011 - 11 answers

## Water dissolving and water removing. There is water at the bottom of the ocean.

I have a perfectly spherical lead weight that weighs 1 kilogram. I drop it from the surface of the ocean directly into the Mariana Trench. How long does it take to hit the bottom, and how fast is it traveling when it hits?
posted by Cool Papa Bell on May 10, 2011 - 24 answers

What is it about boiling water that does stuff to things being boiled?
posted by overeducated_alligator on Jan 22, 2011 - 25 answers

## how to make a water container with todays news?

I need to make a vessel that will hold half gallon of water, and will not leak for at least 1 hour. The catch? I can only use 1 newspaper, 1 pound flour, 1 tablespoon of salt. It has to be ready for tomorrow. I can use my oven to bake it or dry it, so it has to fit in my oven. These are the "only" limitations. Any ideas?
posted by uauage on Nov 16, 2010 - 26 answers

## the green fairy's cousin

why does pernod turn milky when water is added?
posted by mwhybark on Feb 14, 2009 - 7 answers

## How long can you tread water?

If everyone in the world got in the ocean at the same time, how much would sea levels rise?
posted by doift on Aug 18, 2008 - 16 answers

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