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Tegnologie

Graad 8

Strukture

Module 5

Balke, pilare, stutte, dwarsbalke en ankerdrade

Balke, pilare, stutte, dwarsbalke en ankerdrade:

  • Bogenoemde is belangrike dele van strukture. Hulle word gebruik in geboue, brûe en verskillende items, bv. die pype van jou fiets se raam wat in die balkekategorie val.
  • Balke se funksie is hoofsaaklik om vrag te dra. Indien die vrag te swaar is, sal die balk buig. In die ou dae is boomstamme gebruik as soliede balke, maar a.g.v. die koste en gewig daarvan word daar vandag van ander strukture met ‘n verskeidenheid vorms en bestaande in ‘n verskeidenheid materiale, as balke gebruik gemaak.

  • Selfs pilare en lamppale is balke wat in ‘n vertikale posisie is. Pilare is baie nuttig by geboue om bv. stoepe wat oorhang te stut. Indien die pilare nie die gewig kan dra nie, sal die gebou inmekaar val. Ons hoor soms van geboue, veral groot komplekse soos winkelsentrums, wat ineenstort a.g.v. swak konstruksies.
  • Baie van ons televisiestelle is op ‘n stellasie teen die muur gemonteer. Jy sal tog verstaan dat die televisie spanning sal veroorsaak op die platform wat in werklikheid ‘n balk is. Omdat die balk net aan die een ent gestut word, is dit ‘n dwarsbalk. Om die dwarsbalk in posisie te probeer hou, word ‘n stut ingevoeg vir ondersteuning.
  • Soortgelyke stutte vind ons ook by tente en kragdrade. In hierdie gevalle word die stutte deur kabels en toue gevorm.
  • Die skets hieronder toon hoe ‘n leerder sy brug (balk) van strooitjies versterk het deur van ‘n stut en tou gebruik te maak.

Opdrag 5

  • Kyk na die volgende illustrasies en beskryf hoe verskillende kulture tegnologie gebruik het om hul probleme op te los:
    Pyl en boog van Khoi
    Kruisboog van Europeërs
    Spies en skild van Zoeloes
    Swaard
    Ronde Zoeloehut
    Rondawelhutte van Xhosas
LU 3.1

Spitsdakvissershuisies

Opdrag 6

  • Verwys na die volgende en beskryf die impak wat tegnologiese ontwikkeling ten opsigte van strukture al op mense se lewenswyses gehad het:
  • Wolkekrabbers
  • Vliegtuie
  • Dakkappe
  • Treinspore en treine
  • Brûe
LU 3.2

Assessering

LU 3
tegnologie, samelewing en die omgewing Die leerder is in staat om begrip van die onderlinge verband tussen wetenskap, tegnologie, die samelewing en die omgewing oor tyd heen te toon.
Dit is duidelik wanneer die leerder:
inheemse Tegnologie en Kulture:3.1 vergelyk hoe verskillende kulture gelyksoortige probleme opgelos het en bring die verskille in verband met die kultuur en waardes van die samelewings;
impak van Tegnologie:3.2 verduidelik en gee besonderhede oor die positiewe en negatiewe uitwerking wat tegnologiese produkte op mense se lewensgehalte en hul omgewing het.

Questions & Answers

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
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
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
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
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit 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 8. OpenStax CNX. Sep 13, 2009 Download for free at http://cnx.org/content/col11051/1.1
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