<< Chapter < Page Chapter >> Page >

Tegnologie

Graad 7

Strukture en kommunikasie

Module 20

Strukture

Strukture

Toon kennis en begrip van strukture ten opsigte van:

  • spesifieke eienskappe en gebruik van materiaal (bv. waterbestandheid, termiese isolering, brandbestandheid);
  • stabiliteit (bv. basisgrootte, swaartepunt);
  • versterking (bv. rimpeling, laminering, verstewiging);
  • las- en voegtegnieke.

SPESIFIEKE EIENSKAPPE EN GEBRUIK VAN MATERIAAL

Agtergrond

Strukture moet ontwerp en gebou word sodat dit die kragte wat daarop inwerk, kan weerstaan. Die sterkte van ‘n struktuur word bepaal deur

  • die sterkte van die materiaal waarvan dit gemaak is;
  • die gehalte van die verbindings tussen die dele;
  • die vorm van die struktuurdele;
  • die manier hoe die dele gerangskik is.

TERMIESE ISOLERING is wanneer sekere materiale soos plastiek sterk gemaak word sodat hulle hitte kan weerstaan. As hulle eers in ‘n spesifieke vorm gegiet is, kan hulle nie weer van vorm verander nie, aangesien hulle weerstand teen hitte bied. Omdat hulle so hard is , kan hulle wel maklik kraak en breek. Voorbeelde hiervan is die bakwerk van sekere voertuie, sommige gomme, werkoppervlaktes in kombuise, die handvatsels van potte en panne, die bedekkings van skakelaars en sommige bakke, bekers en glase van plastiek.

Opdrag 1:

Om voorbeelde van strukture te soek

LU/AS 2.1.1

Soek voorbeelde van strukture wat met termiese isolering gevorm is en plak dit op ‘n vel papier.

Voorwerpe wat BRANDBESTAND is, toon ‘n weerstand teen hoë hitte. Voorwerpe wat WATERBESTAND is, is waterdig gemaak en kan maklik onder water gedompel word sonder om nat te word.

Versterking

Maniere om sekere strukture te versterk, is deur:

  • RIMPELING, bv. blikke vir opstapeling, en asbesdakplate;
  • LAMINERING, bv. deur plekmatjies of hout oor te trek met plastiek.

Omdat hout terugspring na sy normale posisie as dit gebuig word, is dit nie maklik om geboë of gekurfde voorwerpe uit reguit stukke hout te maak nie. Die praktiese manier om hout permanent te buig, is deur LAMINERING. Party stoele word met gelamineerde hout gemaak. Dun lae hout word aanmekaar gegom. Dit is maklik om ‘n dun laag hout te buig. Elke laag het gom aan en word gebuig oor ‘n vorm en in dié posisie gehou tot die gom droog is. Tennisrakette en dakbalke kan so gevorm word. Het jy al gehoor van gelamineerde vloere? Hoe word dit gemaak?

Assessering

LU 2
TEGNOLOGIESE KENNIS EN BEGRIP Die leerder is in staat om relevante tegnologiese kennis te verstaan en dit eties en verantwoordelik toe te pas.
verwerking:2.2 kennis en begrip toon van hoe stowwe/materiaal verwerk kan word om eienskappe te verander of te verbeter (bv. sterkte, brandbestandheid, waterdigtheid, smaak, volume, tekstuur

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
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
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Tegnologie graad 7. OpenStax CNX. Sep 10, 2009 Download for free at http://cnx.org/content/col11031/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Tegnologie graad 7' conversation and receive update notifications?

Ask