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Re: 2004 hsc question 16 answer thanks :) (basic projectile motion) just want to chec sig figs dont matter in physics, only chem :) Range=\frac{u^{2}sin\left ( 2\Theta \right )}{g} Range=\frac{50^{2}sin\left ( 60 \right )}{g} Range= 220.92m

use acceleration = 3.7ms^-2

I have done 4 uni degrees. Relative hardness in this order: Engineering >>> Science (Nanotechnology) >> Business/Economics > Education Engo is hard as! Some of the harder physics courses are also really hard, but nothing compares to an engineering workload. 30+ face to face hours/week...

In order for an object to have GPE it must be present in a gravitational field, so that it can do work on the field. At infinity, there is no gravitational field, hence it cannot have GPE as it cannot do work on the field. Therefore GPE at infinity would be zero

The pendulum equation used in this experiment is: T=2\pi\sqrt{\frac{l}{g}} by squaring both sides you get: T^{2}=\frac{4\pi^{2}l}{g} Now by plotting Period squared vs length you get a linear relationship The gradient of the line would be equal to \frac{T^{2}}{l} So, you can use...

Class still at 4 students :) Had a 5th, but cricket is apparently more important on Saturdays! Second class starts tomollo Learning about Universal Gravitation and Sling Shot Effect! WOWWWWWWW! My wife said she will make cupcakes 8) -- truth or not, I am unsure

Keep in mind, a raw mark in the mid-70's (iirc) was good enough to get a band 6 last year. So yeah.. was hard! :)

Yes, you can use maths in Physics -- but never EVER Physics in maths. As Physics > Maths -- the mathematicians get upset as whilst they are playing with their abacus, us physicists are off finding tachyonic neutrinos and the like

With 2005 Q5: He has increased the angle and seeing as they are being launched at the same speed, he has therefore increased the vertical component of velocity, hence the projectile will go higher and it will therefore have a longer time of flight. So, the answer is (C) Why is it not (A)...

Make sure you familiarise yourself with as many MC questions as you can. Most are usually pretty straight forward. Do you know WHY you are getting them wrong? If you are unsure as to why the answer is what it is, make sure you post them up here and we can help you out. There often...

Not familiar with the syllabus?  process information to identify some of the metals, metal alloys and compounds that have been identified as exhibiting the property of superconductivity and their critical temperatures Straight from the syllabus mate

It should say The orbital velocity was equal to the horizontal velocity needed for the body to stay in orbit. not escape velocity, they are two completely different concepts.

Correct! :) I don't see any unanswered questions, so... Name a metal, metal alloy and a ceramic superconductor and identify their critical temperatures

As AB rotates, it is still perpendicular to the magnetic field, so the angle it is creating with the magnetic field is always 90 throughout its entire rotation, however, although the force is constant in magnitude throughout its entire rotation, the force is always acting in the same direction...

You so should do your dots in a Fibonacci sequence :) Free bump for ze Drongoski!

ROFL, so true :) Second biggest asian I have ever tutored :) Plus he always has a runny nose.

If he says no he is a liar. You should cut all contact with him and never talk to him again. btw, I know where he lives..

- Cathode Rays displayed both particle and wave characteristics - British physicists believed them to be negatively charged particles, Ze Germans believed them to be EMR - Ze Germans found they could pass thru thin gold foil without damaging it, seeing as the smallest unit of matter was the...

My Saturday class is starting tomorrow :) I currently have 4 students, all of whom are awesome. @Spiral -- I have 1 student willing to travel from Hurstville, you should be the second :P btw, You will not be disappointed with my resources, my teaching, nor my attractiveness

no probs :) goodluck with everything!