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In the late 1980s, the TOMS (Total Ozone Mapping Spectrometer) aboard the Nimbus-7 satellite recorded significant thinning of the ozone layer over Antarctica, evidence led to the acceptance of the theory that CFCs and the chlorine radicals they produce led to the decline of the ozone layer...

These are some example i got for this dot point: naturally occuring base- - DeoxyInosine - present in a DNA template - Alkaloids - complex multi-ring structures, nitrogen generally makes the compound basic and the compound exists in the plant as a salt For the acid, enough info from...

yeah, use the right hand rule and you will find out the answer. Check carefully the slip rings which wire is connected to which. as soon as you find out which way current is flowing, then you will find out the answer! Same as the HSC question.

if the magnetic field is created by coils, when the polarity changes, the direction of magnetic field also changes so that it will continue to spin

Is the answer from jacaranda: terminal A is negative and B is positive?

i thought it was pretty hard test, but if i got more time, should be better. running out of time today.

i had a mind block for few times..it was annoying

i think i did okay for my standard. and VERY happy that its OVER, ext 1 and physics to go!!

i hope i get high 80's

i changed it to D last minute...i thought it might be a trick question i hope is rite

selected solution can be in: molten - which do not have water. so dont think anything about water e.g. NaCl Anode: Cl- ------> 1/2 Cl2 + e- Cathode: Na+ + e- -----> Na (s) dilute solution - this case you need to consider all possible solution that can be present in that...

cyclohexene C6H12 cyclohexane C6H14 im wrong then, but lucky me...thanx guys ;)

refluxing, esterification Pollution ozone related like CFCs titration decarbonating softdrinks battery water stuff biomass, biopolymer prob there is more possibilities

nothing can filter dissolved solids unless it is done through gravimetric analysis

Green algae do not release toxic gas. However, in algal blooms blue-green algae is present which releases toxic gas, or poisons. This blue-green algae is called a cyanobacteria. Not algae

increase number in Cyanobacteria (blue-green algae) undergoes respiration which consumes dissolved oxygen in the night. Probably algae also undergoes respiration

membrane filters are used to filter microorganisms, small particles as Paroissien said BUT do not filtrate dissolved solids like ions

they exist in liquid form at room temperature and pressure unlike methane, ethane exist in gas

yeah, im doing shipwrecks

The second one, NaCl is the most common salt in ocean because it is a salt!! sea water taste like salt and NaCl is the salt we have in our house.... haha... it didnt help did it?