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To answer this question, you need to go back to Year 11 content from Waves and Thermodynamics. To achieve a high electromagnetic field around a wire, you need to achieve resonance, and a standing wave represents resonance. Therefore the length of the wire is related to the positions of nodes and...

Agree with @Unovan this is a weirdly worded set of answers. UV-Vis Spectroscopy relies on photons that are more energetic than infrared, so these photons are not absorbed in rotation, translation or stretching of bonds. These photons are absorbed in electron energy transitions. (A) is sort-of...

All hydrogen bonds are not the same. We can assign a bond enthalpy to the hydrogen bonds, and typical enthalpies can range from -1 or -2 kJ/mol up to as much as -25 kJ/mol. You can talk about the potential for more hydrogen bonding between molecules. The difference between amide and carboxylic...

This is not a valid question. Perhaps you have forgotten the fundamental nature of hydrogen bonding. Hydrogen bonds only last for between one to ten picoseconds. They are highly transitory and subject to statistical distribution and therefore cannot be counted as such. All we can say is there is...

Theory means calculations, so I don't understand the distinction you are making. Perhaps you mean qualitative versus quantitative questions. What about pages 69 to 73 in Copeland. Have you done all of those problems and got them right?

Have you done all the examples in Copeland's "Engineering Studies" volume 2?

For a full discussion of Collision Theory and its influence of the equilibrium constant, please see this previous post. Equilibrium Constant and Temperature

Simple. Apply Lenz's Law. The eddy currents in the copper block will respond in such a manner as to oppose the change that caused it. The cause is the relative motion of the magnet. Therefore the induced eddy currents will try to reduce the relative motion of the magnet. If the copper block was...

I dare you to actually try to saturate a solution of sodium hydroxide, see if you can do it. But be VERY careful, there will be a lot of heat generated. It will look like a slushie with steam coming off, and as soon as it cools down, it will turn back to solid.

This is a stupid question in my opinion. For sodium hydroxide, the answer is "No", it is not an equilibrium reaction. Sodium hydroxide is deliquescent, the solid spontaneously hydrates when ever water is around. There is a large ΔH and large ΔG for this reaction, and you can feel the solid...

The reviewers comments on Eureka Publications website are very favourable. The price of $45 seems very reasonable as textbooks go, and it's printed in colour. It's not a complete guide to the whole Year 12 syllabus, but if you can afford it , why not?

Unquestionably, it is Module 7 Organic Chemistry that is the most difficult. The Year 12 syllabus steadily ramps up in terms of difficulty, from module 5 to 6, and then you hit module 7 and it goes to another level entirely. You have to start understanding the subtlety of shapes of molecules...

The really BIG social implication between fossil fuels and biofuels is competition for available agricultural land and crops. Fossil hydrocarbons store solar energy that arrived on the Earth 250 to 200 million years ago. That's 50 million years of accumulated solar energy that we want to release...

@kractus We are looking for the points where the rate of change of the area of the loop is maximum. That will give the maximum ΔΦ/Δt That would be at points A or C. We are looking for an induced current that flows clock-wise in the loop from P to Q. The static part of the loop of wire P-G-Q is...

In order to provide subject advice, we need to know your career direction. You said you want to enrol in engineering, but you didn't say which discipline.

@Interdice . That essay answer was a total waste of space. I don't know why they bothered printing it. Centrifugal force doesn't exist - it is what we call a fictitious force and you won't find it mentioned in the Physics syllabus. The centripetal force definitely exists. Here is a model answer...

That is correct. This is a very difficult question to give to high school Chemistry students. It is bad enough that we have to learn about spin-spin coupling to reveal the fine scale structure in proton-NMR spectra. But then to ask students to remember the exceptions to the rule is really cruel...

I will attempt to give you a new direction in your learning. You have written a very clear explanation of your dilemma, and this deserves a clear answer. It is never too late to try a different way of learning. Both Mathematics and Science are highly structured in their theory of knowledge...

The NESA rules are quite clear - only one of those written examinations can be reported to NESA as part of the school-based assessment. That written assessment can not contribute more than 30 per cent of the school-based assessment. Schools can conduct other written assessments if they so...

Students are not required to memorise flame test colours for the HSC Chemistry examination. The syllabus does not require it, and even if a question about flame tests was included, the data would have to be provided either in the formula sheet or in the body of the question. The HSC Chemistry...