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re: HSC Chemistry Marathon Archive Next Question: 1) Justify the continued use of the Arrhenius definition of acids and bases, despite the development of the more sophisticated Brönsted–Lowry definition. [3 marks] 2) Why does the neutralisation of any strong acid in an aqueous solution by any...

re: HSC Chemistry Marathon Archive Next question: Explain the impact of an increase in pressure and an increase in temperature on the solubility of carbon dioxide in water. Include a relevant equation in your answer. [3 marks]

1) One theory is the Pressure Flow Theory. The movement of materials in phloem is called translocation. It has 3 main steps: 1. Unloading from source to phloem, usually against a concentration gradient, hence requiring energy expenditure. 2. Movement in phloem due to osmotic pressure. 3...

a) Hybridization is carried out in order to combine favorable characteristics within the fertilisation of a gamete of one species with the gamete of another. An example of this are the cows 'Brahman' and 'Hereford'. The Brahman produces higher quality of milk whilst the Hereford produces large...

What is the process to get glucose from cellulose?

Hey guys, Can someone please help with part (b) in this question. Keep getting confused. Cheers

But thats not from astroman. that answer is from the BOS HSC sample answers. im getting confused here.

but the final answer says its 2.9 x10-8. Shouldn't it be 5.9 x10-8?

I am getting confused in one thing. The equation finds horizontal component of velocity right? So why do these use v.sin(theta)? Shouldn't it be v.cos(theta) as that's for horizontal? Furthermore, when finding the time, how come you don't times it by 2? Through the HSC calculations, it seems its...

Hey guys Can someone help out with part B in this question? Cheers :spzz:

Hey guys, I got this question I am confused about. When a motor is rotating in a magnetic field: 1) in radial magnetic field = box graph 2) in parallel magnetic field = line curved graph This is what we were taught in class, as radial magnetic field makes sure torque is constant and...

Can anyone help me with this question?

Can someone please explain why in the formula F=BIlsinθ, why is sin 90 used instead of sin 30? These questions always tend to trick me, so if anyone can please the fundemental principle behind attempting these questions, I will owe them big time. Thanks :pirate:

Hey guys, Attached is a question regarded Titration. Can someone help me find the concentration of the unknown HCl acid. I can do STEP A and STEP B, but not STEP C. Any help will be appreciated. Thanks

awesome! got it now. thanks squareroot.

Can someone please help with the following question (all a, b, and c). It would be greatly appreciated. Thanks :p

We had a debate in our class. Which international payment provides importer with the LEAST amount of risk (for eg. importing electronic goods from China). A) Payment in Advance B) Letter of Credit C) Clean Payment D) Bill of Exchange Please justify your answer. Thanks :headbang:

Ahh I see. Thanks for quick response.

Can anyone help me with this question? I am getting the voltage as 20/2 = 10 therefore then np/ns should equal 10 too. But there are no options where np/ns equals 10. Am I doing it wrong? Thanks :read:

well...looks like its time to become a plumber. There goes my dreams down the drain.