Search results

But wouldn't that edge be visible for the flange, and it also wouldn't be sectioned because it's not on the cutting plane..?

omg i spent so long in the exam wondering why equilibrium was being violated :'(

Q4 is definitely D, Q10 i think should be B, and Q14 should be B.

what was the info for the boat friction question again? u = 0.3, 20 degree incline, mass = ?

What did everyone get for the force required to stop the boat from slipping? something like 0.4 kN?

I'd like to attend the 3U and 4U exams please :)

They're incomplete.

Yes, but not for the Preliminary course.

This question appeared in the 2013 HSC Q22 b)

Hey guys, just on the topic of piloting, I need some feedback: I'm a year 12 student want to be a commercial pilot but I don't want to do the B Aviation (Flying) course at UNSW because: 1. The course is specifically for pilot training, so there may not be as many job prospects for me after Uni...

ok thanks for the help QZP and Anomalousdecay :)

Ahh i see; so the penetrating power of an EM wave is independent of the EM wave's energy - it only depends on the wavelength of the wave? Anyway, I think I understand why radio waves are used in modulation now - very high penetrating power to go through buildings and hence travel long distances...

Then why is it that gamma rays' penetrating power makes it the most dangerous radiation to humans? If EMR is absorbed by objects of similar size to their wavelengths, then theoretically gamma rays would be blocked by, well, everything, seeing as they're as small as atomic nuclei. :blink2:

But didn't you say earlier that the intensity of, say, a light bulb, measured from a distance decreases with distance due to the spreading of the ''individual'' EM waves; and that each ''individual'' EM wave (which cannot spread out anymore b/c it is just itself) propagates forever unless...

ahh ok, that makes sense; so EM waves can only attenuate by being absorbed by objects. But how do sound waves attenuate then (besides being absorbed by objects)? [I know that sound waves are due to the oscillation of molecules parallel to the direction of propagation].

But don't EM waves obey the Inverse Square Law? So EM waves attenuate with increased distance b/c of the Inverse Square Law + objects absorbing them.This would mean that all EM waves attenuate at the same rate (disregarding the object absorption bit)? Anyway, although EM waves attenuate over...

Well, i'm actually looking for a second related text; i've already got a first related text that's longer and more general

bump

My understanding is that one of the reasons modulation is needed is because: for EM waves to travel further distances they need more energy, so they need to have higher frequency (E=hf?). Is this correct? And is the following also correct?: Waves are obstructed by objects whose dimensions...

I'm having trouble finding a suitable related text for Romulus, My Father. I'm looking for a text (preferably a song or poem) that abides by this topic sentence: One’s genuine relationships with other people provide the foundation for a resolute character and consequently bridge the gap...