To some of the more learned members of this forum.

[Catweazle]

I make it 6.11Kg.

 

 

8 x 68% = 5.44 (the actual weight of wood no water)

 

100/89 (the multiplier required to ensure that the added water is 11% of the total final wood and water) x 5.44= 6.11235

 

To check take 11% off the total - 6.11235Kg x 89% = 5.44 (back to dry wood again).

[Rupe]

Yes we had that on page 2! But then we thought it wrong and changed it.

[Catweazle]

Yes we had that on page 2! But then we thought it wrong and changed it.

 

I couldn't see the proof anywhere, ie take the 11% off and get back to the dry wood weight.

[Rupe]

This isn't a maths exam. Sorry we didn't show our full working and a proof! Its wrong anyway! (We think)

[Catweazle]

This isn't a maths exam. Sorry we didn't show our full working and a proof! Its wrong anyway! (We think)

 

I thought it might help, no need to get upset. It looks right to me.

[Rupe]

Me never upset. We thought it was wrong and the final answer was 8x111/132 = 6.72kg

[Catweazle]

Me never upset. We thought it was wrong and the final answer was 8x111/132 = 6.72kg

 

If original weight is 8kg and 32% of that weight is water then the wood must weigh 5.44Kg ( 68% of 8Kg )

 

If partially dried wood is 6.72Kg and 11% of that is water the wood must weigh 5.98Kg.

 

If partially dried wood weighs 6.11Kg and 11% of that is water the wood must weigh 5.44Kg.

 

The proof is in the proof, you were right the first time, I think.

[Kev Stephenson]

If original weight is 8kg and 32% of that weight is water then the wood must weigh 5.44Kg ( 68% of 8Kg )

 

If partially dried wood is 6.72Kg and 11% of that is water the wood must weigh 5.98Kg.

 

If partially dried wood weighs 6.11Kg and 11% of that is water the wood must weigh 5.44Kg.

 

The proof is in the proof, you were right the first time, I think.

 

Read the previous posts, based on actual percentages you calculation is right but wood moisture is quoted as ratio percentage therefore you are wrong. Where were you last night when we were all tying each other in knots with the different calcs........:001_tongue:

[Quickthorn]

Isn't there 2 ways of quoting moisture? This seems to be where a bit of confusion's come in.

 

There's "wet" basis, where the weight of water is the % of the total weight of the log (wood + water). That's what i thought the OP meant. For "wet" basis, 100 % moisture content is pure water, and you can't have it higher than 100 %. A fresh log half water by weight would be 50% MC (wet).

 

There's also "dry" basis, where the weight of water is the % of the wood only weight (ie a totally dry log). This way, you can have a moisture content higher than 100 %. A fresh log half water by weight would be 100% MC (dry).

[Dean Lofthouse]

Isn't there 2 ways of quoting moisture? This seems to be where a bit of confusion's come in.

 

There's "wet" basis, where the weight of water is the % of the total weight of the log (wood + water). That's what i thought the OP meant. For "wet" basis, 100 % moisture content is pure water, and you can't have it higher than 100 %. A fresh log half water by weight would be 50% MC (wet).

 

There's also "dry" basis, where the weight of water is the % of the wood only weight (ie a totally dry log). This way, you can have a moisture content higher than 100 %. A fresh log half water by weight would be 100% MC (dry).

 

Oh dont you start as well Quickthorn