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Natuurwetenskappe

Materie, meting en reaksies

Materie en meting

Opvoeder afdeling

Memorandum

Opdrag 4:

1. Nee

2. Nee

  • Dit sal styg, want die klein visse beslaan die ruimte van die water en dan moet die water ‘n ander ruimte inneem.
  • Eksperiment: aanvaar enige beplanning wat sin maak, byvoorbeeld ‘n fietspomp waarvan die stang nie heeltemal ingedruk kan word nie as die uitlaatopening toegedruk word.

Massa teenoor gewig: massa gee ‘n aanduiding van die hoeveelheid materie, terwyl gewig aandui hoe sterk die aarde die voorwerp aantrek. Massa bly dus onveranderd terwyl gewig deur die plek op die aarde beïnvloed word – bv. ver op in die atmosfeer is dit minder.

Leerder afdeling

Inhoud

Aktiwiteit: om te kan verduidelik dat alle materie ruimte beslaan en volume en massa besit [lu 1.1, lu 2.3]

Opdrag 4

Materie beslaan ruimte

Bestudeer die volgende sketse en beantwoord dan die vrae wat volg:

1. Kan twee voorwerpe op dieselfde tyd dieselfde ruimte beslaan? (Ja / Nee)

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2. Kyk na die skets van die vis in die akwarium:

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  • Beslaan die vis en die water dieselfde ruimte?

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  • Wat sou met die watervlak gebeur as die vis kleintjies kry?

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Wanneer ons die bostaande sketse bestudeer, is dit duidelik dat geen voorwerpe op dieselfde tyd dieselfde ruimte kan beslaan nie. Die rede is heel eenvoudig: elke voorwerp het sy eie ruimte nodig. 'n Ander afleiding wat ons kan maak, is dat wanneer materie deur 'n ander stof verplaas word, die verplaaste stof ander beskikbare ruimte inneem.

Materie besit volume en massa

As jy 'n blikkie koeldrank opdrink, is die blikkie nie leeg nie. Waar die inhoud van die blikkie eers koeldrank was, is dit nou lug! Dieselfde spasie word dus nou deur 'n ander vorm van materie in beslag geneem! Somtyds praat ons van die inhoud van die blikkie wat verwys na die materie wat in die blikkie is. Die ruimte wat in die blikkie deur die materie (in hierdie geval lug óf koeldrank) beslaan word, word die volume genoem. In 'n sekere sin is volume en inhoud dus sinonieme.

Beplan ‘n eksperiment om te bewys dat lug ruimte beslaan.

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Questions & Answers

so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
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
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Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
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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
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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
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele 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, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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