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Die tipe krag wat ons op die karton uitgeoefen het, is ‘n _ krag, want dit pers die karton saam. Die dele van ‘n struktuur waarop die krag uitgeoefen word, word stutte of kolomme genoem.

[LU 1.3]

AGTERGROND

Wanneer strukture nie sterk genoeg is om kragte te weerstaan wat op hulle inwerk nie, breek hulle. Baie dun, lang stutte of kolomme buig en breek maklik.

Opdrag 7B

Uitdaging :

Probeer dieselfde eksperiment, maar gebruik folio’s i.p.v. manilla.

Opdrag 8A

Kom ons ondersoek die horisontale sterkte van dopstrukture.

Opdrag aan die onderwyser:

Verdeel die klas in groepe. Deel aan elke groep ses A4-manillas van dieselfde dikte uit, twee polistireenglase wat as stutte kan dien en ‘n polistireenglas met ‘n hoeveelheid spykers wat die las kan voorstel.

Opdrag aan elke groep:

Vou die manilla in strukture wat buigkrag moet weerstaan. So ‘n struktuur word ‘n balk genoem.

Eksperimenteer met verskillende strukture en kyk watter struktuur die meeste spykers kan ondersteun. Die lengte van die balk moet dieselfde as die oorspronklike lengte bly. Die spykers oefen ‘n drukkrag op die balk uit en op die onderste gedeelte word ‘n trekkrag na weerskante uitgeoefen. Maak ‘n regmerkie by die tipe balk wat die meeste spykers kan ondersteun.

Opdrag 8B

Probeer nou dieselfde eksperiment, maar gebruik folio’s i.p.v. manillas.

[LU 1.3]

Opdrag 9

Toepassing :

Waarom is daar riffels in konfytblikke, karton en sinkplate?

[LU 3.2]

Opdrag 10

Noem drie maniere hoe ‘n 3D-struktuur meer stabiel gemaak kan word.

  1. Gebruik _ of _ om die struktuur te hou.
  2. Maak die _ van die struktuur breër.
  3. Maak die _ van die struktuur _ .

‘n _ (onder grond, breë deel) van ‘n gebou maak die mure en ander strukture meer stabiel.

[LU 2.1]

AGTERGROND

Soorte strukture

  • dop (verskaf ondersteuning van buite af, sterkte lê in dop, taamlik dun, meestal gekurf, hol)
  • raam (dele word verbind, ondersteun goed van binnekant af, word weggesteek)
  • soliede (bestaan geheel en al uit materie, word versterk)

Baie van die strukture wat mense maak, is ‘n kombinasie van rame, doppe en soliede strukture. Party lyk soos doppe, maar is eintlik rame wat met dun materiaal bedek is. Ons noem die dun materiaal die vel .

Opdrag 11

Kopieer en voltooi die volgende tabel deur ‘n regmerkie onder die toepaslike kolom te maak.

Struktuur Dop Raam Solied
‘n Lang brug
‘n Huis
‘n Telefoonpaal
‘n Fiets
‘n Plastiekglas
Kleiteëls
‘n Kartondoos
‘n Damwal
‘n Koeldrankblikkie
Jou geraamte

[LU 2.1]

AGTERGROND

Strukture kan natuurlik of mensgemaak wees. Ontwerpers van sekere strukture kry dikwels hulle idees uit die natuur.

Opdrag 12

Gebruik twee A4-bladsye en plak prente van ten minste vyf mensgemaakte strukture op een bladsy en vyf natuurlike strukture op die ander. Skryf by elkeen watter soort struktuur, m.a.w. ‘n dop, ‘n raam of ‘n soliede struktuur, dit is.

[LU 1.3]

Opdrag 13

Probeer om een voorbeeld te kry van ‘n struktuur wat die ontwerpers of ingenieurs moontlik op ‘n natuurlike struktuur gebaseer het. Plak die prent of teken dié voorbeeld op ‘n A4-bladsy.

[LU 1.3]

AGTERGROND

Raamstrukture is dele wat verbind word om ‘n raam te vorm. Ondersteuning word dus van die binnekant verleen en die raam is meestal weggesteek. ‘n Raamstruktuur bestaan uit verskillende dele wat struktuurdele genoem word.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Tegnologie graad 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10978/1.2
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