Need help for sience problem?

Question:
I need help on my sience fair project. My problem is *What holds 2 boards together better a srew or nail?*
I got that I just need sights that will tell me some info on why the screw is better.
(And please not the wikipedia! I already looked...)

Answers:

Should fuel injection cleaner be used as a preventative maintanence even if car is running all right?

why not answer the question with a bit of logic rather than relying on external sources. a standard nail has a smooth surface and so offers far less resistance when pulled out of something than a screw, which by nature must be screwed in due to the fact that it cannot simply be pulled out without a lot more effort and damage to the thing its being held in.

What is the best way to remove emblems off your vechicle?

however, because nails can be knocked in in a straight line without need for rotations, they can be knocked in with far mroe force with a screw and thus can penetrate materials a screw may find difficult. also, the different profiles of screws and nails make them suitable for different materials, some which might break upon having a nail hit into them for example, but not when a screw is driven in.

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my washing machine just quit spinning and draining the water whats the problem?

www.google.com,www.askjeeves.c... you could just go on these website ask ask for more websites that have what you r looking for

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how much is it to have a fiesta glitter sprayed?

The screw is less likely to fail from lateral forces.

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what is the best way to tell which axle needs replaced on a front wheel drive car?

A screw always will hold better than a nail, however you might want to include some information on new technology like the hurriquake nail which was in the news a couple weeks ago. Also if you are doing this for a science fair project it might be good to include information on why this is important. For example, using a screw instead of a nail takes longer but helps the house stand up to hurricanes and other natural disasters.

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Some tips to improve my Maruti 800 headlight...?

hey i got it think a nail is smooth so it can slide in and out of the wood easy where as a screw locks its self in the wood

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How do you install an ignition switch for a 1967 Chevy Impala?

Probably because the nail is Just Stabed in and can be pulled out, but the screw has those swirly edges(don't know what they're called) and needs to be unscrewed to take out

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Can a transmission of a car be adjusted if it seems to be missing, or is it hopeless and going to go out?

When properly applied "Gorillia Glue" is better than both. try adding a segment on adheasives too.

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