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Natuurwetenskappe

Energie-oordrag en kragte

Opvoeders afdeling

Memorandum

(a)

  • Chemiese – elektriese
  • Elektriese – kinetiese
  • Kinetiese – hitte-energie
  • Hitte-energie – chemiese

(b)

(i) Elektriese energie – klankenergie

(ii) Chemiese energie – kinetiese energie

(iii) Warmte energie – elektriese energie

(iv) Elektriese energie – ligenergie/klankenergie

(v) Elektriese energie – warmte-energie

(vi) Elektriese energie – klankenergie

(c) Speel-trekker.

  • Potensiële energie – kinetiese energie

Leerder afdeling

Inhoud

Aktiwiteit: om verskillende vorms van energie-omsetting te identifiseer [lu 2.3, lu 2.4]

Energie-omsetting in motorenjin

(a) In die battery van ‘n motor word chemiese energie omgesit tot elektriese energie. In die motorenjin word die elektriese energie omgesit tot kinetiese energie (bewegingsenergie). Wanneer die motor oorverhit, word die kinetiese energie omgesit in hitte-energie. Wanneer die oorverhitte enjin afkoel, word die hitte-energie weer omgesit in chemiese energie.

Identifiseer die energie-omsettings deur dit te onderstreep.

(b) Kyk na die volgende prente en sê watter energie-omsettings plaasvind.

(i)
(ii)
(iii)
(iv)
(v
(vi)

(i) _________________________________________________________________

(ii) _________________________________________________________________

(iii) _________________________________________________________________

(iv) _________________________________________________________________

(v) _________________________________________________________________

(vi) _________________________________________________________________

(c) Pret met energie-omsetting.

Maak jou eie speel-“trekker”

BENODIGDHEDE:

  • Leë garetol
  • Rekkie
  • Tandestokkies
  • Ronde skyfie kerswas met ‘n gat in die middel

METODE:

1. Ryg die rekkie deur die gat in die garetol.

2. Steek ‘n halwe tandestokkie deur die rekkie aan die kant van die garetol.

3. Sit die skyfie kerswas aan die anderkant van die garetol met die ander punt van die rekkie wat deur die gat in die kerswas gesteek is.

4. Steek die heel tandestokkie deur die rekkie aan die kerskant.

5. Wen die “trekker” op deur hierdie stokkie te draai.

6. Sit dit dan op die grond neer.

7. Watter energie-omsetting word gedemonstreer?

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7. Energie vraagstukke

Die gebruik van energiebronne rig ernstige skade aan ons planeet aan. Ons het vroeër in die module gekyk na die voor- en nadele van fossiel- en kernbrandstowwe. Een van die nadele van kernbrandstowwe is dat die radioaktiewe afvalstowwe nie vernietig kan word nie. Wanneer daar per ongeluk van die radioaktiewe stowwe sou lek, sal dit skrikwekkende gevolge hê.

Sommige lande het nie self olie (‘n fossielbrandstof) nie en moet olie by olieprodusente koop. Die olie moet in groot olietenkskepe vervoer word. Dit gebeur dikwels dat hierdie tenkskepe langs die kus strand en massiewe olieslikke veroorsaak.

Assessering

Leeruitkomste 2: Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.3: Dit is duidelik wanneer die leerder inligting interpreteer, bv.: interpreteer inligting deur kernidees in die teks te identifiseer, patrone in aangetekende data te vind en gevolgtrekkings te maak uit inligting in verskeie vorme (bv. prente, diagramme en geskrewe teks);

Assesseringstandaard 2.4: Dit is duidelik wanneer die leerder kennis toepas: pas konseptuele kennis toe deur ‘n begrip wat onderrig is met ‘n variasie van ‘n soortgelyke situasie in verband te bring.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
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
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
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
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Source:  OpenStax, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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