Search results

so when we do 5 - 4 0101 = 5 -4 = 0100 = 1100 (2's comp) now if we add 0101 + 1100 this calculation (even though the 5 is in normal representation) is in 2's compliment (as one of the numbers is in 2's comp) so we must exclude the carry after 4 bits? however if it was 5 + 5 we do not exclude...

so are you saying the records are just stored in the sequential file using delimiters and are read by the programme into an array to create an array of indexed records? cause if so, if the tAB is separating the records, whats separating each field in the record lol cause this would explain why...

so if ArrayIndex is the index for each AOR in the file and index is for the index of each record in each AOR, should it be WHILE Index=/= eoArray? as it will be the last item in that AOR which after it has been processed will cause ArrayIndex to implement to the next AOR along the file? to be...

yeh you helped heaps. i think i grasped this now but yeh uncertainties with b like if there can be many different structed data types in the one file, and inside these are other structured data types (i.e. an array of records and inside this there are records), if it stores the data structure...

lol i just returned to this post and i finally understand the point 5 an epiphany aha so like water O-H covalent and so the 0 is more electronegative in the bond and attracts the electron pair in the covalent bond towards itself. This creates a di-pole on the moluecule i.e. O is negative, H is...

ok yeh i get that thanks heaps so metallic character is just their ability to loose electrons i.e. the less electronegative the higher the metallic character??? or is it just their ability to hold onto their own electrons, not necessarily attract other atoms' EDIT: metallic character is just...

yeh i was afraid i would overwhelm or not be clear basically was asking a) how is it possible to perform a binary search on a sequential file if they arent indexed b) is a sequential file just a file where all the structured data types (record, array of records etc) are delimited, but then...

i see. i thought we only get rid of the overflow if its an addition? ok so we have -5. when do twos compliment to represent it as a negative number we get 1011. So, is this a completely different err i dont know how to word it. Like, i mean we know its a negative as we have done 2's compliment...

well hopefully youll get it. just keep studying hard. ur lucky you can still consult your teacher lol mine went on holidays so she just gave me the sam davis book so ive been using that this week. so much stuff i didnt know aha i dont see how i got the marks i did this year without using a...

what makes an element more metallic? i.e. what makes the element Sodium more metallic than lithium and potassium more metallic than sodium? and how does this affect their oxide's nature?

basically JW about the particle accelerator where the helium is injected into the nucleus of the target element. This would mean there are more Protons yeh? so its ratio of N:P is lower yeh? so the nucleus is unstable? cause i got confused when some1 said its only when N:P is too high, not too...

Excell "they may be manufactured in a cyclotron(particle accelerator) in which protons are introduced to the nucleus, resulting in a deficiency of neutrons(proton-rich)" so i thought that yeh, but accelerating the hydrogen atoms in the vacuum chamber and then inserting the target substance, the...

ok yeh i only just read the textbook to see there were logical and physical. ive got it pretty much down pat now studies heaps of them last night just to clarify one last thing. a) if you put a hub on a physical bus using a logical bus, i dont understand the point of this bus. Because a logical...

yeh it does nice just to clarify a) you couldnt accellerate a radioactive isotope that wasnt a transuranic element? youd have to neutron bombard? b) so basically a nucleus is instable if the atom is really have and doesnt have enough protons? Is this because as the atom gets heavier its nucleus...

im confused so a nucleus is unstable when a) P : N ration is too high or low for the atomic number? (does any1 know the exact cut off?) b) its mass number is too large ?? can some1 explain these? and for the production of transuranic elements and radioactive isotopes are they done the same...

So a sequential file uses delimiters and a sentinel value to show when its the eof. a question from 2006 trial 2006. We are reading a sequential file which has an array of records on it. Records in the array are sorted on surname of students. Now, i was under the impression that a sequential...

also, can you have a physical ring topology which uses a bus logical topology?

So with a bus topology: a hub is placed as a node connected to the trunk cable. A node wishing to send data sends it down the drunk cable to the hub, which sends it back along the trunk cable untill a PC who it is addressed for recognises it and accepts it? that seems pretty stupid lol why...

so pretty much nothing happens to the iron as the as iron is loosing electrons and the water is gaining them in preference. so the iron isnt involved at all? but i guess when the Zn goes the iron oxidises to reduce the water yeh and then rusting occurs? my teacher said the Fe was gaining the...

ok i think i get it so: 3mg : xmg 0.35L 1L 3mg x 1 : xmg 0.35L L 8.57 = xmg/l there fore 8.57mg/L = 8.57ppm :)