Recent content by wizzkids

You wouldn't expect to get a question asking you to graph results from a first-hand investigation. A more typical HSC Physics graphing question would be something like, "A magnet is dropped through a conducting loop. Draw a graph of the resulting EMF versus time." OR "How does the kinetic...

The magnetic flux density around a long, straight conductor is circular and symmetric. It varies as 1/R outside the conductor, and within the conductor it varies linearly down to zero flux at the centre. It is a non-uniform field. To calculate the flux outside the conductor you use integral...

Surprise, surprise, yes you are going to have to do some study if you want to pass Physics. Nobody is going to spoon-feed you. If you don't want to self-teach from a long-winded textbook, then I would recommend you get ********* Year 11 Physics by Jamon Windeyer. Study each module and dot point...

Yes, that's true. That is valid interpretation of the use of the term "relative". Relative to C-12.

The data gives the mass of three different molecules Your task is to figure out what would be the mass of 1 Mole of each of these three molecules. The answers are X=56 g/mol, Q= 107.8 g/mol and Z=254 g/mol. That is all you can determine from the data. You can't work out empirical formulae or...

That's screwy, move on, next question.

Try to repeat what Galileo did at his villa around the year 1590. He rolled cannon balls dipped in black ink across an inclined plane. The cannon balls left a black line that was parabolic. Then he analysed the equations of motion for a parabola, and he showed conclusively that mass did not...

Watch out for this one! In mathematics we define the vector for a plane as the perpendicular to the plane. In at least one recognised Physics textbook, they take the angle of the coil to be the angle between the sides of the coil and the B-vector. Clearly these are not the same definitions and...

* means complex conjugate

Ammonia is cool, because it can be used as a refrigerant gas in the Joule-Thomson Effect. As human civilisation weans itself off using CFCs and HCFCs that destroy the ozone layer, we will turn to using ammonia as a refrigerant gas. The enthalpy of vaporisation of ammonia and the pressure...

The University of New South Wales has developed a library of very good Physics animations. Much of it is suitable for the year 11 and Year 12 Physics course. The site is called PhysClips, and you can trust the content, unlike some of the YouTube channels. Joe Wolfe and colleagues have spent...

Methods of analysis: (1) titration against a known standard solution, reveals the concentration of an acid and possibly if it is monoprotic, diprotic or triprotic. (2) conductometric titration, reveals the ionic strength of acids and bases, the percent of dissociation (3) instrumental techniques...

Seriously? Your HSC was in 2021, and presumably you did some Chemistry. What sort of answer do you want? High School level, or university level?

The question about methods of measuring the speed of light is covered very well in most elementary text books. Basically you are looking at light "chopper" experiments conducted over very long baselines. You break a stream of light into very short pulses with a precisely known time period, and...

In the old syllabus, the dot point said, "Students learn to: identify why the term ‘g forces’ is used to explain the forces acting on an astronaut during launch." It was part of the applied "Space" module. Yes. G-force has been removed from the 2018 syllabus. G-force is not really a force; it is...