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could you give me an example of such an experiment please? :)

okay, but my other question still stands - can an experiment be valid but inaccurate?

Can you say an experiment is 'moderately valid' as it contains features of both a valid and invalid experiment, is it only acceptable to say it is either valid or invalid? Also, can an experiment be valid but inaccurate?

I connected a 3V battery pack to a 6V battery pack in series and the motor runs just fine, with decent RPM; + the coil doesn't feel warm so i don't think overheating or too much current is the problem. Also, the coil is enameled so it shouldn't be short circuiting. :/

So I've built this DC motor for my Physics assignment. It runs perfectly fine on a 6V battery pack and 3V battery pack but doesnt seem to work on a 9V rectangular battery (with battery snap); well, the coil moves slightly so it seems that there's minimal current going through the coil. However...

Indeed. Cheers Anomalousdecay (ahaha seems you run into me wherever I go)

School Rank: 10-20 English (Advanced) Rank: 125/168 Mark: 67/100 Average Mark:74/100 Engineering Studies Rank: 1/10 Mark: 87/100 Average Mark:71/100 Maths (Extension 1) Rank: 1/108 Mark: 100/100 Average Mark:84/100 Maths (Extension 2) Rank: 5/59 Mark: 94/100 Average...

Yes I tried turning it on and off again... still nothing happens. I tried the brightness buttons as well but they don't work, implying that the magnet dislodged its mechanism or something.....

My idiot cousin ran a fridge magnet along my laptop and now he screen brightness turned off and won't turn back on, even after restarting many times. Everything else works normally and the screen is still on - it's just that there's no brightness (I can see the screen by shining a flashlight on...

Okay thanks for the help guys!! :D

uhh, so am I correct? :confused2:

Okay guys, so based on the info given, I have deduced the stuff below. Can you guys just verify that it's all correct? Thanks :D Ohm’s Law: V = IR where V = voltage (drop in EPE per Coulomb of charge due to resistance) I = current flowing through resistor R = resistance of resistor...

I understand the qualitative explanation, but not the quantitative derivation. From what I've seen, P = I^2R is derived from P = VI and V = IR (Ohm's Law). Substituting Ohm's Law into P = VI gives P = I^2R, but I don't understand why P now gives you 'power loss' instead of 'total power'.

so we know the derivation of P_total = VI, but how about P_loss = I^2R?

wtf your whole grade does ext 1, and more than two thirds do ext 2?? Is this Ruse??

Ok thanks for the advice guys :)

No...

What?

Hey all. I'm a year 12 student who, you could say, studies more than the average person (~4 hours a weekday). Recently I've been deprived of sleep because I can't get my mind off my studies during sleep - I'm literally doing calculations in my head or thinking of work from a certain subject. As...

I'm not certain if the 80.00 ATAR is for B Aviation (Flying). <http://www.science.unsw.edu.au/future-students/bachelor-aviation-management> Here it says that B Aviation (Management) ATAR cutoff is 80.00. But for B Aviation (Flying) it doesn't say anything here...