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Wiskunde

Graad 5

Meting en tyd

Module 41

Massa

Massa

Aktiwiteit 1:

Om probleme op te los wat die kies van standaardeenhede insluit [LU 4.6]

1. Net soos by lengte, is dit noodsaaklik dat ons sal weet wanneer om gram, kg en ton as eenheid te gebruik.

Werk saam met ’n maat en maak beurte. Neem enige drie voorwerpe in jou klas. Hou elkeen apart vas en rangskik hulle dan van die ligste tot die swaarste. In watter eenheid sal jy jou items weeg: gram? kg? ton?

Voltooi die tabel:

Item Van lig tot swaar Eenheid
1 . .......................................... .......................................... ..........................................
2 . .......................................... .......................................... ..........................................
3 . .......................................... .......................................... ..........................................

Onthou jy nog?

1 000 g = 1 kg

1 000 kg = 1 ton

Soms is items / artikels so lig dat jy nie kan sien hoeveel hulle weeg op ’n gewone skaal nie. Maak ’n regmerkie by dié wat jy dink ’n massa van minder as 1 gram het.

’n veer
’n krammetjie
’n haarrekkie
’n uitveër
’n lemoen
’n pen
’n koppiespeld
’n sandkorrel
’n haar

Aktiwiteit 2:

Om te meet en op te teken [LU 4.5.1]

Om met toepaslike meetinstrumente presies te meet [LU 4.7.1]

Het jy geweet?

Om die massa van ’n item te bepaal, beteken dat ons wil weet hoe swaar die item is of hoeveel dit weeg . Om dit te kan doen, benodig ons ’n skaal . Aan hoeveel verskillende soorte skale kan jy dink?

Skryf hul name hier neer.

1. Kyk goed na die volgende voorbeelde van skale. Werk saam met ’n maat en skryf die lesing op elke skaal neer.

1.1

1.2

1.3

1.4

1.5

1.6

2. Kyk na die volgende tekeninge en skryf die massa van die voorwerpe neer.

2.1

2.2

2.3

2.4

Aktiwiteit 3:

Om te skat, te meet en op te teken [LU 4.5.1]

Om met toepaslike meetinstrumente presies te meet [LU 4.7.1]

Werk in groepe van drie. Bring die volgende items van die huis af saam:

’n skaal ; 1 koppie rou rys ; 1 koppie suiker ; 1 koppie koekmeel ; 1 koppie sout ; 1 koppie graanvlokkies en 1 koppie rosyntjies.(Onthou om dieselfde koppie te gebruik wanneer julle afmeet!)

1. Bepaal nou die massa van bogenoemde en voltooi die tabel.

Item Massa in g geskat Gemeet Verskil
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................
.............................................. ......................... ..................... .....................

2. Wat weeg die swaarste?

3. Wat weeg die ligste?

Aktiwiteit 4:

Om probleme op te los wat die kies van berekening met en herlei van standaardeenhede insluit [LU 4.6]

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
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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
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
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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, Wiskunde graad 5. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col10993/1.1
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