Higher Level Physics

celtic723

smndly wrote: »

Right heres some answers i got... Can anyone confirm them?:

Q1. g=10.15

Q2. f= 15. (something)

Q3 mew= 6x10^-5

Q5. (h) emf= 45V

Q6. (i) a= 2.97
(iii) friction = 26.2N

Centripetal force = 771
Height = 5.01

Q9. (i) 0.16
(iii) 16A
(iv) 40000 W

Q10. Max net mass of particles: 7.13x10^-27
:pac::pac::pac:

think your g is wrong coz i got 9.8 spot on
0.16 is correct
can't remember what else i got.

Dmullar

smndly wrote: »

Right heres some answers i got... Can anyone confirm them?:

Q1. g=10.15

Q2. f= 15. (something)

Q3 mew= 6x10^-5

Q5. (h) emf= 45V

Q6. (i) a= 2.97
(iii) friction = 26.2N

Centripetal force = 771
Height = 5.01

Q9. (i) 0.16
(iii) 16A
(iv) 40000 W

Q10. Max net mass of particles: 7.13x10^-27
:pac::pac::pac:

I got the same results for questions 2, 9 and 10, but I got 9.8 spot on for Q1. And i got something way different for question 2....:(

Alexl

Pixiesticks wrote: »

will I lose much for forgetting a 2? cause I wrote out the formula and everything I just forgot to use the 2 when multiplying it out =(

I doubt you'll lose too many marks. Maybe 3-6, they cant punish the same mistake twice so I wouldnt be too concerned.

Pixiesticks

for the net mass of particles in Q10 did you have to multiply the energy by 2 cause there were 2 protons?

Fringe

Hm.. I got 10.2 for g in Q1. Does anyone know what the range usually is? I was going to do it again but I wasted about 40 minutes doing that question so I moved on.

Pixiesticks

Pixiesticks wrote: »

for the net mass of particles in Q10 did you have to multiply the energy by 2 cause there were 2 protons?

Yah, the total energy was 4 GeV.

According to 2004's marking scheme (the last time g by free fall came up), as long as your answer is in the 9.8 - 10.2 range you're ok. I got 10m/s^2 for mine, anyway.

CallMeDoctor

smndly wrote: »

Right heres some answers i got... Can anyone confirm them?:

Q1. g=10.15

Q2. f= 15. (something)

Q3 mew= 6x10^-5

Q5. (h) emf= 45V

Q6. (i) a= 2.97
(iii) friction = 26.2N

Centripetal force = 771
Height = 5.01

Q9. (i) 0.16
(iii) 16A
(iv) 40000 W

Q10. Max net mass of particles: 7.13x10^-27
:pac::pac::pac:

Hey i got 10.3 for gravity!

For people who got 9.8 did ye calculate it from d graph?? Because no marks otherwise g= slope x 2

Ya i got d same also for Q 9 and 10
Hopin for the A1

celtic723

CallMeDoctor wrote: »

Hey i got 10.3 for gravity!

For people who got 9.8 did ye calculate it from d graph?? Because no marks otherwise g= slope x 2

Ya i got d same also for Q 9 and 10
Hopin for the A1

aye i done it both ways and got 9.8 both times.WOOO

CallMeDoctor

celtic723 wrote: »

aye i done it both ways and got 9.8 both times.WOOO

Nicew one wel done how many marks wu i lose for bein out of the range?

CallMeDoctor

CallMeDoctor wrote: »

Nicew one wel done how many marks wu i lose for bein out of the range?

Again, according to 2004's marking scheme, you'd lose 3.

CallMeDoctor

-JammyDodger- wrote: »

Again, according to 2004's marking scheme, you'd lose 3.

Thanks man did anyone get lyk 63 m/s^2
for the max acceleration in d shm question!?:cool:

Alexl

CallMeDoctor wrote: »

Thanks man did anyone get lyk 63 m/s^2
for the max acceleration in d shm question!?:cool:

Dont think so, me and my friends all got 6 point something, not quite sure......

Did anyone get 22 for the maximum number of orders???

Dmullar

CallMeDoctor wrote: »

Thanks man did anyone get lyk 63 m/s^2
for the max acceleration in d shm question!?:cool:

I think i got 1.5

63 would be very fast for a ball attached to a spring, thats about 220 km/h.

Alexl wrote: »

Dont think so, me and my friends all got 6 point something, not quite sure......

Did anyone get 22 for the maximum number of orders???

I got 14

lou91

Yeah I got 22 for that.
Then you multiply it by two for images on each side.
I forgot the central image though, so left it as 44 when it should have been 45.

Mallox

oh that exam was a disaster .. tink i passed it tho ... hey why was amreicium not found in nature .. is it an isotope or sometin???

Heggy

Yeah, I got 45 for the no. of images.
Annoyed I forgot to double the energy in the particle physics.
I was pleasantly surprised by the paper though.
Of the ones I did, I'd say the heat pump one was the most awkward.
Anyone else do that?

CallMeDoctor

ya i know wer i went wrong now i forgot a decimal! from the start how many marks wu i lose for that is it lyk maths !!!>??:mad::mad::mad::mad:

Heggy

I couldn't see them taking away much more than a couple of marks for arithmetic errors.

Heggy

Quote:
Originally Posted by CallMeDoctor
Thanks man did anyone get lyk 63 m/s^2
for the max acceleration in d shm question!?

I think i got 1.5

63 would be very fast for a ball attached to a spring, thats about 220 km/h.
Quote:
Originally Posted by Alexl
Dont think so, me and my friends all got 6 point something, not quite sure......

Did anyone get 22 for the maximum number of orders???

I got 14

63 was the elastic constant was it not?

Pixiesticks

Mallox wrote: »

oh that exam was a disaster .. tink i passed it tho ... hey why was amreicium not found in nature .. is it an isotope or sometin???

I dno...I said it was unstable o.O

Jack Sheehan

Eh, it was alright. Didnt make a balls of the whole paper, even though I expected to. The experiments were ****e though.

Pygmalion

Oh wow I only answered like half of at least one question I took a shot at... ****

sock puppet

That went really well. Did an extra question. Did Q 5 and then 8-12.

Think I got the calculations for Q9 wrong. I ended up with the defilibrator having a current of 16mA or something. Seems a bit low but I'm not sure how big it would have to be in reality.

The Question 5 and 12 were easy. But I didn't know why Americium doesn't occur naturally.

Q8 was okay. It was an extra question for me. I knew the first part mostly but I didn't get the last part about the nature of light. And did anyone get the maximum velocity of an electron? I just wrote out the figures for hf= phi + 1/2(mv^2) and solved for v.

Q10b. Probably the easiest applied electricity question ever. You didn't have to know anything from the chapter except the induction coil and loudspeaker.

Q11 was good too. Knew heat alright so I did well.

Also can someone tell me which electromagnetic waves have less energy than white light? I said microwaves and infrared but I wasn't sure about infrared.

Heggy

Also can someone tell me which electromagnetic waves have less energy than white light? I said microwaves and infrared but I wasn't sure about infrared.

Well, I didn't do that question but the higher the frequency the higher the energy.
So, Infra red, Microwave and Radio will all have less energy.

Richyj_0

Hopefully a C...:)

sock puppet

Heggy wrote: »

Well, I didn't do that question but the higher the frequency the higher the energy.
So, Infra red, Microwave and Radio will all have less energy.

Thanks. Yeah it was apart from radio waves. I always get ultraviolet and infra-red mixed up. Not that it matters anymore:D

ciaran brady

i got 22.9 for the order images so i put down 23. r u supost to use pythagorous' theorem and get sin value dat way?

Pygmalion

What did everyone get for half life of Americium-241?

I got like 23 seconds doing it two different ways, then converted it to years and got something very small... I'm assuming since it asks in terms of years I should have gotten a much bigger answer.

sock puppet

Pygmalion wrote: »

What did everyone get for half life of Americium-241?

I got like 23 seconds doing it two different ways, then converted it to years and got something very small... I'm assuming since it asks in terms of years I should have gotten a much bigger answer.

I got around 420 years iirc.

ciaran brady

americium isnt in the periodic table is dat a valid answer?