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Toe Tyd Begin Het

  • Aan die begin, toe daar nog geen heelal was nie, was daar ook nie tyd nie. Die teorie is dat die begin van alles soos volg verloop het:
Tyd Gebeure
0 Sekondes
  • Heelal begin as klein warm balletjie
10 -35 sekondes
  • Ruimte swel uit teen ’n duisend biljoen biljoen biljoen keer per sekonde
10 -32 sekondes
  • Ruimte word oorstroom met energie en materie soos kwarks
10 -8 sekondes
  • Materie en antimaterie ontstaan
3 minute
  • Kwarks smelt saam en vorm waterstof en helium
1 miljoen jaar
  • Gaswolke vorm lang stringe
300 miljoen jaar
  • Stringe wolke vorm wat sterre en sterrestelsels vorm

Aktiwiteit 2:

Om jou kennis te toets

1. Waaruit het die heelal aan die begin bestaan?

2. Wat is die “Oerknal” of “Big Bang”?

3. Hoe het die eerste elemente ontstaan?

4. Wat is ’n kwark?

5. Hoe het die volgende elemente ontstaan?

a) Be

b) Fe

6. Noem die vier belangrikste kragte in die heelal?

7. Wat is antimaterie en wat gebeur as dit naby materie kom?

Assessering van begrip ten opsigte van die teorie oor die ontstaan van die heelal:

Verstaan jy die teorie?

[LU 2.3]

Om ‘n opdrag oor teleskope te skryf

Skryf ’n projek van vier bladsye oor die gebruik van teleskope en die basiese bou daarvan. Lewer in op ’n datum soos bepaal deur jou opvoeder.

  • Vind meer uit spesifiek oor die volgende:
  • Hubble-teleskoop
  • Mcmath-sonteleskoop in Arizona, VSA
  • Reuse radioteleskoop – die Arecibo – in Puerto Rico
  • Die SAAO in Sutherland, Suid-Afrika
  • Die SALT (Southern African Large Telescope) by Sutherland wat in 2004 voltooi is
  • Die radioteleskope by Hartbeeshoek, Gauteng
  • Die SKA
  • Sluit jou verslag af met ’n oorsig oor die waarde van die teleskope vir die wetenskap.[LU 1.1; LU 1.2; LU 1.3; LU 3.1]

Die Sterrestelsels – “Galaxies”

  • Ons son is slegs een van ’n massiewe versameling van ongeveer twee biljoen sterre wat in die vorm van ’n gebakte eier met ’n deursnit van 100 000 ligjare in die hemelruim lê! As jy saans opkyk na die hemelruim en ’n ligband van fyn sterretjies sien, kyk jy na die Melkweg . Dit is eintlik net ’n blik op die randjie van ons sterrestelsel! Die Griekse woord “galakta” beteken “melk”.
  • Die aarde lê sowat 300 000 ligjare weg van die middel van ons sterrestelsel.
  • ’n Ligjaar is een van die belangrikste EENHEDE in die ASTRONOMIE wat jy moet ken. Wetenskaplikes gebruik sulke eenhede omdat m en km onsinnig raak in die wye uitspansel met die groot afstande.

Aktiwiteit 3:

Om afstand in ligjare te bereken

  • ’n Ligjaar = die afstand wat lig in een aardse jaar aflê, indien dit beweeg teen ’n snelheid van 300 000 km/s -1

1. Bereken: ’n ligjaar

  • 365,25 dae x 24 uur x3 600 sekondes x 300 000 km/s -1 = ......................................
  • Dus: .................................................. kilometer
  • Miljoen, biljoene en triljoene?
GETAL 10 N NAAM VOORVOEGSEL
1 000 000 10 6 MILJOEN MEGA
1 000 000 000 10 9 BILJOEN GIGA
1 000 000 000 000 000 10 15 TRILJOEN PETA

2. Hoeveel sterre is in ons hemelruim?

3. Druk 10 biljoen biljoen uit as ’n getal (dit sou die voorvoegsel exa hê).

4. Nog ’n belangrike eenheid is die ASTRONOMIESE EENHEID (AU) wat die afstand van die son na die aarde voorstel, naamlik 150 miljoen kilometer .

Questions & Answers

What are the factors that affect demand for a commodity
Florence Reply
differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
what is labour ?
Lambiv
how will I do?
Venny Reply
how is the graph works?I don't fully understand
Rezat Reply
information
Eliyee
devaluation
Eliyee
t
WARKISA
hi guys good evening to all
Lambiv
multiple choice question
Aster Reply
appreciation
Eliyee
explain perfect market
Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
What is ceteris paribus?
Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
yes,thank you
Shukri
Can I ask you other question?
Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
how do you save a country economic situation when it's falling apart
Lilia Reply
what is the difference between economic growth and development
Fiker Reply
Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
Abdisa Reply
any question about economics?
Awais Reply
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
thank you so much 👍 sir
Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
Feyisa Reply
Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
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Source:  OpenStax, Natuurwetenskappe graad 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11068/1.1
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