Physics Predictions...

techguy

Anyone here got any ideas on what might be coming up on the physics paper ths year?
Anything at all is helpful to me at this stage to help ease my nerves..


Oh Noooo!! Less Than A Week Left :eek: :eek:

exiztone

Well, you have a bit more than a week until the physics. As far as I know, the calculating G with the SHM of a pendulum has a high chance of coming up.

It's crazy the way physics is such a broad course and difficult too, whereas economics is so short and sweet. They should really have a common difficulty standard for all subjects

Waltons

e=mc^2 and/or photoelectric effect. Apparently it's 100 years since Einstein explained these

sephirosis

For Section A they usually ask one electricity exp, one mechanics, and 2 from light/sound/heat. so far they have never asked g by pendulum, or Newtons second law (f proportional to a) exp's, so they seem likely to come up. in electricity resistance against temperature for metal/thermistor has never appeared so it might be worth a look, or they could just go for the old favourites of ohm/joule. as for the other light/sound/heat ones they are a little harder to predict. snells law maybe but it seems to easy. an actual SHC question has not come up yet but it probably wont since you get to choose your own method be it electric/mechanical so its difficult to set a fair question but you never know. i cant see the sonometer experimanet coming up since f against L was on a few years back, and more recently f against both T and L. Speed of sound in air maybe?

Section B is always varied. If ohm isnt on section A it will prob be Q 8. i would say know the theory and definitely know your maths for the circuits, they might throw in a rheostat thingy used as a potential divider. as someone said already photoelectric effect with einsteins equation looks good. option q doesnt change much. and finally if ohm isnt on either section A or q8 it will almost surely be a part of q12. they love it that much.

remember in the end predictions are often futile though (the ironing is delicious) good luck all

hellsbells

ah its funny how much of that i dont understand! Im doin physics as Gaeilge!

*Angel*

exiztone wrote:

It's crazy the way physics is such a broad course and difficult too, whereas economics is so short and sweet. They should really have a common difficulty standard for all subjects

It would be nigh impossible to set a common difficulty standard for all subjects, everyone has difficulties in different subjects, I am pretty good at physics and don't find it too bad but I'm terrible at languages :mad: , and I'm sure economics would actually kill me (tried it in 4th year).

*Angel*

If you're stuck for time in physics the things to cover are:

- mandatory experiments
- mechanics (always up)
- option question

But I really think that most of the course has to be covered if you're going for a high grade, however you could still get a high grade if you cover a certain amount of topics really well. There is after all quite a lot of choice on the paper.

OTliddy

First of all, I don't advise relying on these posts for your leaving cert, and im not jus saying that to be a fart. Every year, they cover all the topics in some way. However, if you must, here are some areas that they havent asked much about yet:
Section A
-F=ma
-Thermistor/resistor variation with temperature
-Diode
-Snell's law

Section B
Derivations of acceleration
Circular motion........dammit
Geometrical optics
electrical circuits
electromagnetic induction
Einstein(just cos its his 100th anniversary of relativity)
Harmonics
Good luck evryone!

Joe_duffy

Kepler's third law t2 proportional to r3
/the t2= 4(pie)2*r3/gm is comin up...what out for the photoelctric effect and circular motion too..

daxon

i hate circular motion. the F=ma is defo cuming up .an't been on the exam yet

stevoxbx

Kepler's third law t2 proportional to r3
/the t2= 4(pie)2*r3/gm, what chapters that in the book?! I dont remember it :eek:

*Angel*

stevoxbx wrote:

Kepler's third law t2 proportional to r3
/the t2= 4(pie)2*r3/gm, what chapters that in the book?! I dont remember it :eek:

It's part of circular motion.

eoinmurphy

sephirosis wrote:

remember in the end predictions are often futile though (the ironing is delicious) good luck all

I never knew Ironing could be delicious,
Irony on the other hand......

upmeath

Learn all your formulae and q5 is three grades in the bag.
Learn your formulae and mechanics and your two parts of four for q11 are pretty much sorted
Learn whatever experiments haven't come up and breeze through the experiments that appeared in 2002

Johnerr

Anyone got any dead certs, or near enough to dead certs for the physics paper? need to pass it, hopefully a c, but thats pushing it

*Angel*

Johnerr wrote:

Anyone got any dead certs, or near enough to dead certs for the physics paper? need to pass it, hopefully a c, but thats pushing it

Particle Physics

Johnerr

doing the applied electrictiy option

*Angel*

Johnerr wrote:

doing the applied electrictiy option

I've done both but I'd do the particle physics because it's generally an easy topic, I hate drawing the motors/generators... in the applied elec.

Other than that if you concentrate on the experiments, mechanics and your option you're at least looking at a C.

:Keith:

Particle Physics is real easy. I don't see why my Physics teacher thinks it's hard.

Johnerr

what chapters are the machanics chapters?

Vikings

How do I pass the pass paper? What do I need to learn on sunday night?

vote4pedro

If you want to just scrape a pass, just learn the experiments. That section is worth 30%, the questions are always the same (draw a graph, state two precautions etc.) and they also come up in different parts of the long questions, so combined with having picked up the odd bit of info over the years you'll easily get 10% in that section, added to your experiments giving you a pass of 40%.

Also, whenever asked for a precaution in the experiments, you can almost always say
a) Use bigger values of water/voltage/distance, to reduce percentage error
and
b) Avoid error of parallax when reading measurement.

chicken_food

vote4pedro- sounds like somebody went to pat doyles class!

StevieK5000

Good theory but you cant get all 30% in exps by studying them for the first time the night before, it would be some massive fluke if you could!

vote4pedro

chicken_food wrote:

vote4pedro- sounds like somebody went to pat doyles class!

P. Diddy is the man !

Experiments are simple, very easy to score high marks in once you learn the procedure and what the graph should look like.

chicken_food

Certainly is! Hes a genius! Especialy his jokes!

Legend

dross

ah, c'mon, he's a bit of cúnt. his formula goes: make a really really really obvious joke that you saw coming 20 minutes ago then when everyone stops laughing spew some physics. and his notes are bollocks. but he's alright.

JackKelly

yes, how he condenses the entire course into a handful of notes is complete bollox.....
I don't particularly like the notes, as the physics is boring, but as notes go, they are fairly good. Better than doing it by the 300pg+ book.

StupidLikeAFox

vote4pedro wrote:

Also, whenever asked for a precaution in the experiments, you can almost always say
a) Use bigger values of water/voltage/distance, to reduce percentage error
and
b) Avoid error of parallax when reading measurement.

c) wear safety goggles

Always works in chemistry anyway!

vote4pedro

I think I'm going to leave out Nuclear Physics and Magnetism, can't get my head around either. I reckon I'll be safe enough with knowing my experiments, Mechanics, Light, Sound, Heat, Particle Physics and having a general grasp of electricity, probably not enough to do a full long question on elec. though.

Richard_Fonzie

I didn't think his notes (p. doyle) were that great either, but his classes are excellent! I nearly cried when he made that analogy between the way the geiger-muller tube works and dance halls in the 50's