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LoL! Who is this? By the looks of that sentence, you still have plenty of English studying to go before Monday! :P

Thanks for all the feedback already guys! Will look into those suggestions, thanks Dr :D

Hey guys and girls, I have begun to video my school classes and will be uploading the edited videos to my YouTube channel. I am hoping that they will prove useful to everyone who views them. I will update this post as new ones are edited and uploaded. If you come across any significant...

I get what you are saying, but I have often seen in marking criteria that they want you to explicitly say that holes in VB move in opposite direction to electrons in CB. Ofc electrons in VB move in the same direction as electrons in CB, but they may want you to compare the direction of movement...

What you need to say is the following: - Doping with Group III creates an acceptor energy level. This energy level lies just above the valence band and the thermal energy of surroundings is high enough to allow electrons to transition from the VB to the acceptor level. This creates a hole...

re: HSC Chemistry Marathon Archive Can't do it without knowing the total volume of solution though. Which means you need to figure out the volume of Ba(OH)2 added initially. It was originally a multi-part question, but I made it as one :)

re: HSC Chemistry Marathon Archive Answer is 12.95. Perhaps post your working seeing as others have come up with incorrect answers! :)

re: HSC Chemistry Marathon Archive New Question: (kudos to addoil) [4 marks] A student titrated 0.14 M barium hydroxide solution with 22.35mLs of 0.08M nitric acid to the equivalence point. The student accidentally spilt an excess 13.5mL of barium hydroxide into the mixture. Calculate the pH...

It's the direction that positive charges WOULD flow if they were responsible for carrying current.

Seems to be addressed, but I will add my way of explaining it anyway! - Clockwise torque is exerted on the coil, causing coil to spin and hence to experience a change in flux. - Current will be induced in such a direction to oppose the motion of the coil relative to the magnetic field...

Sure is! I have also had a spot open up in the Saturday 11:30am class. Contact me via PM if interested :)

re: HSC Physics Marathon Archive Try to do it using physics formulae and perhaps a trig identity :)

re: HSC Physics Marathon Archive I think Mexicans have a maximum height of ~0.3m, so he is firing from his sombrero level

re: HSC Physics Marathon Archive This will NEVER appear in the HSC, but a harder projectile question ;) A Mexican farmer standing on a 1m platform fires a taco from his Juan Direction taco launcher from a height of 1.3m above the ground at a speed of 444m/s. If the border patrol is at a...

re: HSC Physics Marathon Archive I'd be looking for something along these lines - Outline / Description of transformer (focus on use of soft iron core to link magnetically primary and secondary coil) - Outline / Description of granular ferrites (individual grains of ferrites) - Link to...

Tuesday 6:00pm-8:00pm - 1 space remaining Saturday 11:30am-1:30pm - FILLED Saturday 2:30pm-4:30pm - FILLED

Yep! Such 'switches' are termed 'interrupters' and are how induction coils function!

Just be careful when saying DC cannot be used, as it is true that a TRUE or STEADY DC source cannot be used (constant positive voltage/current), whereas VARYING DC, which is somewhat similar to an absolute value sine graph (non-constant positive voltage/current) could be used as the...

Some Types of superconductors are able to have large currents flow through them. As you know (hopefully!) when current flows through a conductor, that current produces a magnetic field. Basically superconductors are used like electromagnets, but due to zero resistance, they are able to have...

Nope! If there was a double bond between the two C's then they would be geometric isomers, but this is beyond the HSC course