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The information in that question makes no sense. It starts off talking about a sample of river water, and then it goes straight to the calibration curve. There is no mention of the test result on the sample. Something has been deleted.

Oops ... the answer is 0.8 millimetres. Thanks for pointing that out, I used the wrong expression for the circumference of a circle. Doh!

Hi everyone. I did another copy of my answers to the 2024 HSC Engineering studies examination. Can somebody go over my answers and check if they are all correct? Thanks to FudiddidoAdrian and tomn22 for constructive feedback. This is the corrected copy.

CD-ROM as others have said, is a read-only technology. Disc diameter is 120 mm and 1.2 mm thick. The standard data capacity is 680 Megabytes. Data is encoded as a spiral track containing a series of pits on a thin layer of aluminium, sandwiched between two very flat layers of plastic. Data is...

No, you won't be tested on obscure rules. There are international standards for drawing network diagrams, but you are not required to know them in IPT. However it is very useful if you can use pictorial symbols like these for the common building blocks of computer networks.

The exact mathematics of the CRC is outside the scope of the IPT Course. If you have a copy of Samuel Davis' book then you can find a few examples on pages 253-256. There are many CRC standards, but they all require a "generator polynomial" which is just a binary number. The sender and the...

Make sure you are familiar with the basic distinction between a pictorial drawing and an orthogonal (orthographic) drawing. Remember that hidden lines are NOT to show on pictorial drawing. Make sure you are familiar with AS1100 rules for dimensioning orthogonal drawings. Make sure you are...

It is another form of the relation v2=u2+2as. It is only considering the vertical component of velocity vy = v sin θ You should be able to derive this relation easily.

It's all about the rate of change of flux (see Faraday's Law). And don't forget - a falling flux and an increasing flux both generate an electric field potential.

Parity bit is the least accurate form of error checking, but it can be performed extremely fast in hardware and therefore it has an important place in data transmission. Parity bit is added to the data packet to ensure that there is an even number of ones in the packet. It can be fooled by a...

Yes, there is a method to reading a Chemistry question, just like there is a method to writing the answer to a Chemistry question. The first thing you have to un-learn is the Advanced English approach! You read a novel or a poem in whole language, the meaning is only revealed after you have read...

Question 26(a) is examining Year 11 Physics content, namely the inverse square law of radiation intensity. Intensity is measured in units of watts per square metre per steradian (solid angle). If the number of square metres of the solar panel is constant, then power is proportional to...

This question is examining your understanding of the binding energy in the nucleus and its connection to the mass defect. The energy released in step X is given in the body of the question, 1.20 MeV For a 3-mark question, the marking scheme would probably be: 1 mark for proposing a valid reason...

Whoever wrote that question about properties of water waves, they should be banned. "Dispersion" is not caused by "waves bending around the edges of an object". That is a description of diffraction. "Superposition" is not caused by "waves bending near an object". Dispersion is a change in the...

The answer is (C). This question has been answered before. See here: https://www.boredofstudies.org/threads/physics-revision-for-prelims-stuck-on-a-mod-1-q-%F0%9F%92%80.409710/#post-7578030

You are correct, the answer is (C). In all questions regarding relative velocities, if you are asked to find the velocity of A relative to a moving frame of reference B, rather that a stationary frame of reference, you must subtract the motion of the moving frame of reference.

The correct answer is (C). Galvanometer 'X' is normally stationary. In normal operation if a positive potential is applied to the + terminal of a galvanometer the armature/needle deflects clockwise to the right (an application of the motor effect). Now if instead the body of galvanometer 'X' is...

Evaporite minerals are sedimentary deposits that have precipitated from hot aqueous solutions. Therefore they almost invariably contain some water of crystallisation. For example, a very common evaporite mineral is hydrated gypsum, whose chemical formula is CaSO4. 2H2O. Therefore I would include...

Definitions: PARTICIPANTS: the personnel who actually have responsibility for inputting, retrieving, transmitting, processing, transforming and reporting the data in the system. Participants are people who have a stake in the efficient operation of the information system. INDIRECT USERS: the...

To understand why the position of equilibrium does not correspond to equal molar concentrations of products and reactants, this could only occur if the rates of the forward and reverse reactions are exactly matched at the equimolar concentrations. This almost never occurs. One reaction is...