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The reason we include Engineering Report Writing in Year 11 and Year 12 is to get students used to the structure of proper academic writing. Yes, you should have an abstract. Go have a look at some academic journals, see how the pros do it. There are places called academic publishing services...

Nuclear stewardship is a broad responsibility. Nuclear materials is what you will be dealing with; mostly you will be learning about power reactors and high-flux breeder reactors, but it will cover everything from mining, milling and concentrating radioactive and fissionable elements, through to...

H2S is flammable, so it contributes to the calorific value of biogas; the enthalpy of combustion is -518 kJ/mol of H2S. However the products of combustion are SO2 and H2O so you still have an atmospheric pollution problem to deal with.

If you don't know what the UNSW Prep Program is all about, then go and find out. Here is the link to the UNSW Handbook: https://www.handbook.unsw.edu.au/undergraduate/specialisations/2024/REGZE1?year=2024 The Preparation Program for Science includes a large number of electives, but basically you...

Regarding your compass, make sure it is a spring-bow compass with micrometer adjustment from a reputable brand. Those cheap wobbly compasses are worse than useless. If you have a reasonable budget, and you enjoy drawing then you could shop for an A3-size drawing board with T-square, protractor...

Every school has a different interpretation of depth studies. This is allowed. In theory, depth studies are supposed to be very diverse, and offer scope for students to pursue a topic of their own choosing, and present it in any way that is effective and scientifically valid. It is also allowed...

NESA has now published the marking guidelines for 2023 Engineering Studies, and it appears with regard to Question 21 (c) the Chief Marker has accepted just about any isometric view of the wing spar will receive full marks, regardless of whether it conforms to the stated viewing direction or not.

@anonymoushehe I think you are making a common mistake in confusing enthalpy with temperature. Temperature is an expression of the kinetic energy of particles. Enthalpy is the total internal energy of a system. In an endothermic reaction, the temperature of the system goes down because the...

Well that's an interesting hypothesis. Let's see if there is any evidence from the chemical data. You would need to compare molecules with approximately the same molecular weight. If you compare a range of primary, secondary and tertiary alcohols with 4 carbons, the trend is not clear-cut: I...

No, of course not. They are my freehand drawings.

I want to draw attention to what appears to be an error or drafting mistake in the NSW Engineering Studies examination. Question 21 was the first of the extended response questions, and it was examining Aeronautical Engineering. The question was worth 11 marks. It had four parts (a) worth 2...

EMF is not a force. EMF is a field potential or field potential difference. The units of EMF are joules per coulomb. The EMF of a point in an electric field is defined as the work done to bring 1 unit of positive test charge from infinity to that point within the electric field. The electric...

Thanks for the [!!!]WARNING[!!!]. Better stop swimming in the ocean - too much chloride

Ignore all the conversation about commutators and radial magnetic fields. Just consider a single current loop in a uniform B-field as shown below: The vertical segments are experiencing a constant force shown by the red vectors, and the two forces constitute a couple or moment. The horizontal...

The mass loses kinetic energy and gains GPE as it moves from A to B. Let the velocity at the bottom be v1 and the velocity at the top be v2 The change of gpe is U = 2mgr. The change of KE is U = -1/2 m (v12 - v22) Equate the two expressions and eliminate the common factor "m" you get: 2gr =...

The mass of solution is M= 14 g + 100 g = 114 g The density rho ρ of the solution is ρ= 1.060 g/mL so divide M by ρ and you get V=107 mL of solution. The 14 grams of the hydrous MgSO4.7H2O contains n = 0.0568 moles. Therefore divide n by V and you get 0.53 mol/L

Ava-Gardner

You are using the Arrhenius theory of a strong base. The Brönsted-Lowry theory is not restricted to aqueous solutions. If Ca(OH)2 is a good proton acceptor (which it is), then it is a strong base according to the latter theory.

I think any further debate will likely result in arcane hair-splitting. However, for students sitting their HSC Chemistry exam, there will be just three states of matter, they are solid, liquid and gas and the only other mixture they are likely to be examined on is the aqueous mixture, and we...

Thanks for that contribution, you got me thinking that can't be right because IUPAC has reserved the term "sol" for colloidal suspensions, so I went to the references. In the Journal of Pure Appl. Chem., Vol. 80, No. 2, pp. 233–276, 2008. doi:10.1351/pac200880020233 © 2008 IUPAC they give the...