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how did i manage to considerably weaken a piece of wood using nothing but the pitch of a sound?

for a school experiment, i tried to find out if this would work, 82.4Hz actually strengthened the wood by an average of 7.5N, (compression strength) but 164.8Hz, 329.6Hz, 359.2Hz, actually decreased the strength by 52.5N, 57.5N, and 52.5N again. should this have worked?
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Categories: Plants.

Tags: Music, homework.

 

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Is it rare to find a petrified tree with soft tissue remaining in the centre?
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  • Asked by Freundel
  • on 2010-08-16 12:28:17
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Categories: Planet Earth, Plants.

Tags: tree, trees, Fossil, Petrified.

 

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The thorns of roses and blackberries are designed to catch, rather than repel, animals. Why?

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Categories: Plants.

Tags: rosethorns.

 

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Why do some plants such as carrots, parsnips and sugar beet (biennials) store food one year and fruit the next ?

The energy to make the food store could go directly to making fruit or seeds. Then there would be twice as many reproductions.  The same question applies to potatoes.

 
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  • Asked by stephenf
  • on 2010-06-24 18:14:23
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Categories: Plants.

Tags: PlantScience, biennial.

 

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When the trunk of my tree snapped, I taped it back together. Months later, the break had healed. How did the tree repair itself?

The trunk of a small fir tree in my garden broke, and the tree fell over. More in hope than expectation I pulled the top part back up, taped the halves back together, and screwed in metal plates to hold them in place.

To my amazement the tree survived and, months later, when I removed the tape and the plates, the break had healed and the trunk was whole again. How do trees repair such trauma? Can all tree species do it?

Alan Crowther, Birmingham, UK

Editorial status: In magazine.

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Categories: Plants, Unanswered.

Tags: tree, trunk, heal, repair, break.

 

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Why does the part of my Hebe that was damaged by digging near the roots, apparently killing it off, wilt?

The 'live' part of the plant isn't affected by drought as badly, only browning at the edges of the leaves, rather than bending over.
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Categories: Plants.

Tags: drought, Deadplant, Hebe, wilting.

 

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I found this in my garden growing under a bush, what is it? Some kind of mushroom?

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  • Asked by Humpf
  • on 2010-06-13 15:23:09
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Categories: Plants.

Tags: plant, mushroom, weird, garden.

 

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As fruit are the way some plants have birds and animals distribute their seeds, why are some fruit poisonous?
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  • Asked by Sev
  • on 2010-06-10 01:20:13
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Categories: Plants.

Tags: Fruitseeds.

 

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Why does this apple tree only blossom on one side?

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Categories: Plants.

Tags: Biology, tree, Abnormal.

 

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Why don't slugs and snails eat weeds in my garden?

As they eat every other plant in it.

Consequently why doesn't somebody make an eco friendly weed killer that you spray onto weeds that makes it attractive to slugs and snails. A slug n snail pheromone so to speak. That way we could get them to do something positive with their lives that would benefit us rather than having to kill them all the time.
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  • Asked by aturnb
  • on 2010-05-21 12:53:57
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Last edited on: 2010-05-21 20:31:51

Categories: Plants.

Tags: plant, Slugs, Weeds.

 

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