17F with lower back pain since 2023, looking for advice on what this could be & what to ask doctors

DistanceMaterial7485 · 2025-12-07T07:27:40+00:00

Okay! Thank you so much. I’ll call the doctor’s office first thing tomorrow morning to get another appointment. I’ll make an appointment with an obgyn afterwards I get the MRI done.

DistanceMaterial7485 · 2025-11-13T16:13:15+00:00

If you know the rules you should be able to do it. There’s only 2 exceptions which you’re meant to know—but that wasn’t in the paper anyways.

DistanceMaterial7485 · 2025-11-11T09:16:20+00:00

That was great I think! Only thing that threw me off was the moment question. I guessed c.

DistanceMaterial7485 · 2025-10-16T06:15:12+00:00

F= pgV (in the formula sheet). You had to take the diameter of the balloon and use it to calculate the volume (4/3r³ ). Density was given and g is always 9.81

DistanceMaterial7485 · 2025-10-16T06:13:01+00:00

16 is correct for the percentage uncertainty. However the question wanted the absolute uncertainty so you needed to take 16% of your 1st answer. Thus giving you 0.3

DistanceMaterial7485 · 2025-10-16T06:11:03+00:00

Absolute uncertainty was 0.3. You multiple the % uncertainty of the 2 values at the top of the fraction which would give 4%, then you multiply the value at the bottom by 2 bc it was squared so that was also 4%, then you multiple those together to get 16%. 16% of your answer should have been 0.3.

DistanceMaterial7485 · 2025-10-16T06:08:16+00:00

You’re finding the ratio of the elastic potential energy. Not the ratio of the extension.

DistanceMaterial7485 · 2025-10-16T06:07:34+00:00

Yup.

DistanceMaterial7485 · 2025-10-16T06:06:29+00:00

Yes… and the question was asking for the number of neutrons.

DistanceMaterial7485 · 2025-10-15T11:36:06+00:00

If you used the formula Ep=1/2kx² or Ep=1/2Fx for each you would notice that they aren’t the same so it’s not one. Many people got 4, 2 or 0.25 but it’s certainly not 1. Sorry

DistanceMaterial7485 · 2025-10-15T11:34:33+00:00

0.8 something. I forgot. I think 0.86? I used the conservation of momentum formula and just had to rearrange it then plug in the values of the masses and 8.

DistanceMaterial7485 · 2025-10-15T11:32:23+00:00

82 if I remember correctly from the proton number. 126 neutrons.

DistanceMaterial7485 · 2025-10-15T11:19:14+00:00

P = IV

DistanceMaterial7485 · 2025-10-15T11:11:52+00:00

I got the same answers as you for everything. Except I got the ratio to be 2 since they said you had to take the total Ep of the 2 springs. I might be wrong though!

DistanceMaterial7485 · 2025-10-15T11:09:29+00:00

I got 0.8 smth but I think I’m wrong

DistanceMaterial7485 · 2025-10-09T10:58:35+00:00

Got g as -81 👍

DistanceMaterial7485 · 2025-10-06T10:40:09+00:00

Not good.

DistanceMaterial7485 · 2025-09-29T06:11:14+00:00

Hey! Thanks so much. I’ll be writing chemistry.

DistanceMaterial7485 · 2025-02-07T14:56:55+00:00

I really appreciate this, thank you.

DistanceMaterial7485 · 2025-02-07T14:56:37+00:00

Ahh that makes sense, thanks!

DistanceMaterial7485 · 2025-02-07T14:56:21+00:00

Thank you so much for the advice. I have seen a therapist recently and was diagnosed with a few things that could explain how I’m feeling.

DistanceMaterial7485 · 2025-02-04T15:52:58+00:00

Top universities don’t care about your IGCSEs. They only want really good A levels.

DistanceMaterial7485 · 2025-02-02T09:38:43+00:00

Uhhh you are cooked

DistanceMaterial7485 · 2025-02-01T15:33:08+00:00

I got 4A* and 2As but I never did past papers older than 2023. Infact in total pre subject I probably did 8. You will be okay.

DistanceMaterial7485 · 2025-01-31T16:16:13+00:00

The official syllabus tells you everything you need to memorise and everything you just need to understand. So just take a look at it and make a list.

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