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Yep, u have understood :) If they ask that question in the HSC i would start my answer by stating "Assuming that intensity is referring to..." then go rom there :)

Yep, as mentioned above, use the term "diamagnetic" this is when an object can create a magnetic field which opposes a magnetic field (or more correctly, a change in magnetic flux) which is incident on it and curve the lines of magnetic flux away from the material, or in the case of...

Yeah, you see that book is incorrectly defining "intensity" as radiant energy per unit time. It would really depend on if we are defining "light" as a wave or a particle Intensity of light when regarding it as a wave would be defined as radiant energy per unit time or the integral of radiant...

g = Gm/(r^2) g earth is approx 10 (g earth / g mars) = (m/r^2)earth / (m/r^2)mars g mars = g earth * (1/10) / (0.5^2) = 10*(1/10)*4 = 4 Sorry, can't set out the working amy better on my phone, LOL

Initial GPE = Gm1m2/r m1 = mass of satelitte (500kg) m2 = mass of Earth (6x10^24kg) r = distance between centre of Earth and orbit (radius of Earth + altitude) -- in the question they gave u diameter, the sneaky bastards, you need to divide this by 2 to get the radius. You also need to multiply...

What does doppler effect have to do with the observed time betwen pulses?

By the way, i forgot to mention that there is an equation for photocurrent. I can't remember it off the top of my head, but in essence, the photocurrent generated depends on a few variables: 1. Optical power 2. Absorption coefficient 3. Reflection coefficient 4. Frequency of light...

Good question. The answer depends on the definition of "intensity" -- both of which are kinda correct I would think that "intensity" has been defined differently in the two texts. For our sakes "Intensity" implies number of photons per unit time. Example: Wavelength A (lower wavelength) has...

So, this question was in 2005? This is really dealing with the hall effect, so to speak, which was taken out of the syllabus after 2001. I'll just answer for the sake of answering, even though it has already been answered by the previous answerees However, using F = qv x B Holes and electrons...

Time of flight = 2 x Time to reach maximum height ONLY WHEN THE OBJECT LANDS AT THE SAME VERTICAL POINT What you are finding when you multiply the time to reach max height by 2 is the time taken to reach the initial vertical displacement (i.e., 0) The object still needs to fall another 100m...

Lol, that's my point exactly.. He came into this thread and began reciting words from a textbook example as if it applied to the question asked by the original poster, which it clearly did not. Then he began mouthing off at me as if his recitation still held some merit. Yes And he was better...

Mate, you should do it. Prelim is a bit airy fairy, more like expanding a little on the Stage 5 course, but the HSC course is real interesting. His attitude towards his studies may be good, but his attitude towards others on the forums sucks ass. You don't come out here on these forums and...

WTF are you on about? Do you even have any idea what the question is actually asking?? LMFAO Please remind me what section we are in again?? On yeah PHYSICS Just saw that you are in year 10. That explains why you have no idea what the original poster is asking. Stick to sections in...

Easy. 228

The angle is given :) "A stone of mass 0.2 kg was thrown horizontally" The angle is 0 :) So that means the initial velocity (20ms-1) is the initial horizontal velocity (Ux) and the initial vertical velocity (Uy) = 0 I'm sure you can do it now :) for (a) just use s = ut + 1/2at^2 where: s =...

Sorry, i should have clarified. I meant just the baryons which you should have learnt, i.e., Proton, neutron. You may need to link the baryons and mesons together under the "hadron" family, which is simply matter which are composed of quarks. Distinguish between the baryon as the group of...

The standard model of matter recognises four fundamental forces in nature - graviational force, EM force, strong nuclear force and weak nuclear force. The standard model describes three of these forces in terms of force carrying particles called Bosons. The EM force is carried by photons, strong...

You really should do the topic which is the strength of the teacher. If she wants to do astrophysics, it's probably for a good reason :) Q2Q is a really good follow on from I2I though and some of the old I2I syllabus is actually imbedded through Q2Q, it is extremely interesting :)

Yep, it's kinda like if you are in a queue at the doctors and everytime a new patient goes into the doctors room, everyone moves forward one seat. The people moving forward are the electrons, the gap left by each person moving forward is the hole. In reality, holes actually do have a "mobility"...

Yeah, this is all to do with the twin paradox and if you read a little into it, specifically the Langevin explanation, saying that as the "astronaut" is accelerating, it is the acceleration which causes "symmetry breaking" between the inertial and non-inertial reference frames, so it is this...