Search results

Soz guys, I have been having issues with the video editing software which I have been using -- being unable to import the videos taken from my iPhone :\ Probably my fault for getting an iphone :\ Anyway, I am going to start taking my laptop to class now and record directly into the software...

That'd be cool! Haven't shot any more videos as the last 3 lessons we have gone through their prelim exam and we have just done some calculation questions. I am going to begin to video all of our lessons (including problem solving sessions) from now. So, should pretty much be updated...

Think about it this way. Moon is 384,400km away from Earth. Figure out GPE 384,400km away from surface of the Earth. Figure out GPE on surface of Moon. Why are they different? :)

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!