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Natuurwetenskappe

Energie-oordrag en stelsel

Besparing van energie

Opvoeders afdeling

Memorandum

1. Hitte/warmte.

2. Baie na min.

3. Hitte vanweë wrywing: al die energie word dus nie vir die dryf van die wiele gebruik nie

4. Hitte: of vanweë wrywing by die band op teer en dus die persoon wat trap. Weer eens word al die energie nie doeltreffend aangewend nie.

5. Warmwatersilinder, warm bad, swembad, huis na buite, ens.

6. Enjin wat olie brand (al die brandstof ontbrand nie), slinger wat gebuig is en nie maklik draai nie, swak kontakpunte in elektriese apparaat soos motors, stomp gereedskap (boorpunte, saaglemme, ens.).

7. Ligte wat onnodig brand, warmwatersilinder wat nie afgeskakel word nie, onnodige gebruik van apparaat, bv. verwarmers as die huis nie goed geїnsuleer is nie, warm water in bad en dan wag dat dit afkoel as dit te warm is, elke keer warm water oopdraai as iets in die kombuis afgespoel word, ens.

Leerder afdeling

Inhoud

Aktiwiteit: om te kan beskryf wat energieverlies beteken [lu 2.3, lu 3.2]

  • Bestudeer die volgende sketse en beantwoord die vrae wat daarop volg:

1. In watter vorm gaan die energie uit die huis en uit die koppie tee verlore?

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2. Die energie beweeg dus van waar daar s ________________________ is na waar daar ___________________________________ is (vul in min of baie)

3. Dink aan 'n ander voorbeeld: 'n persoon bestuur 'n kar waarvan een van die remme vasgeslaan het. Energie gaan verlore. In watter vorm? Beskryf:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

4. Nog 'n voorbeeld: jy ry op jou fiets, maar een van die bande is pap. Energie gaan verlore. In watter vorm? Beskryf:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

In albei hierdie gevalle (3 en 4) gaan energie verlore omdat die stelsel nie reg funksioneer nie.

Onnodige energieverlies kan ook plaasvind as stelsels wat goed funksioneer, nie korrek gebruik word nie, byvoorbeeld as jy 'n yskasdeur dikwels oopmaak of die deur vir lang tye laat oop staan, of wanneer jy 'n bietjie melk in 'n klein kastrol op 'n groot stoofplaat opwarm.

5. Noem nou nog vier voorbeelde waar energie verlore gaan omdat dit versprei van waar daar baie is na waar daar min is.

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6. Noem ook vier voorbeelde van energieverlies vanweë 'n sisteem wat nie reg funksioneer nie:

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7. Noem ook vier voorbeelde waar energieverlies plaasvind omdat toerusting foutiewelik gebruik word:

_____________________________________________________________________

_____________________________________________________________________

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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.

Leeruitkomste 3: Die leerder is in staat om begrip van die onderlinge verband tussen wetenskap en tegnologie, die samelewing en die omgewing te toon.

Assesseringstandaard 3.2: Dit is duidelik wanneer die leerder die impak van wetenskap en tegnologie verstaan.

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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natuurwetenskappe graad 6. OpenStax CNX. Sep 17, 2009 Download for free at http://cnx.org/content/col11080/1.1
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