Author: Anonymous

Fill-in the blanks: a)  The following orbital diagram belongs to an ion, X2+.     The chemical symbol of X is [a].   b) An h subshell has [b] orbitals.  c) Consider Mn and Mn3+.  Which one has the largest radius, the atom or the ion?  (Note: Do not write the symbol, in the space write the word atom or the word ion.) The [c]. d) Of the elements beryllium, boron, carbon and lithium,  the one with the highest first ionization energy is [d].  e) For the subshell 4f, the value of the principle quantum number is [e]. f) Consider the data in Table 1 below: Table 1: Calorimetric Data for Aluminum and Copper Subtance Mass Initial Temperature Final Temperature Aluminum 5.0 g 15 oC 27 oC Copper 5.0 g 55 oC 27 oC The substance that had an exothermic process was [f].  

A combination of a 2.0-Ω resistor in series with 4.0-Ω resistor is connected in parallel with a 3.0-Ω resistor. What is the equivalent resistance of this system?

Sarah asks, “What happens in your brain when you are depressed?”  You explain depression is caused by [answer1] levels of the neurotransmitter [answer2] that plays a role in regulating mood.  Sarah then says, “Okay.  I think I get it.  What kind of medication would help me do that?”  To which you answer: [answer3].  

2) SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts over TCP. A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. Suppose you wish to build a packet filter rule set allowing inbound and outbound SMTP traffic. You generate the following rule set: ule Direction Src Addr Dest Addr Protocol Dest Port Action A In external internal TCP 25 permit B Out internal external TCP >1023 permit C Out internal external TCP 25 permit D In external internal TCP >1023 permit E Either any any any any deny a) Describe the effect of each rule.

VRAAG 8 Faktoriseer die volgende volledig: 8.1

VRAAG 3 Vereenvoudig die volgende: 3.1 (2) 3.2

VRAAG 1 Die volgende vrae word as moontlike antwoorde gegee.  Kies die antwoord en skryf slegs die letter (A – D) langs die vraagnommer neer.  Byvoorbeeld, as die korrekte antwoord vir 1.1 A is, skryf u antwoord as 1.1 A. 1.1 Wat is die GGD van 360, 900 en 2250?       A         9000 B          925 C         8750 D         950 (1) 1.2 Gee hierdie tabel ‘n voorbeeld van getalle in direkte verhouding, indirekte verhouding, beide of nie een van die bogenoemde nie? 2 4 6 8 48 24 12 8 6 1       A         Direkte verhouding B          Indirekte verhouding C         Beide A en B D         Nie een van die bogenoemde nie. (1) 1.3 24 liter water word binne 20 sekondes gepomp. Hoeveel water word binne 3 minute gepomp?       A         206 L B         216 L C         200 L D         226 L (1) 1.4 Watter EEN van die volgende getalle is irrasioneel?     A         3, 777777777777777777… B        

WANNEER DIE TYD VAN DIE HIERDIE EKSAMEN KLAAR IS SAL DIT SLUIT. ‘N QUIZ WAT WISK SBA07a OPLAAI GENOEM WORD, SAL NA DIE EKSAMENVRAESTEL VIR SLEGS  30 MINUTE OOP WEES OM JOU ANTWOORDBLAD AS ‘N PDF OP TE LAAI. NADAT JY HIERDIE EKSAMENVRAESTEL VOLTOOI HET DRUK “SUBMIT”EN DAN “NEXT”.

NADAT JY HIERDIE EKSAMENVRAESTEL VOLTOOI HET DRUK “SUBMIT” EN DAN “NEXT”.

VRAAG 7 Vind die produk van die volgende: 7.1