Recent content by koat

Hello my teacher said that percentage uncertainty is a measure of precision and percentage difference a measure of accuracy. i thought it's the other way round?? say if i have 20% and 80% what do these values tell me in terms of precision and accuracy?

2pi*40/60= 4/3 pi f= 4/3pi*1/2= 2/3 vmax= 2pi*2/3*2.5*10^-2 but the answer is wrong :(

A mass between 2 springs moves with shm. it oscillates between 2 points 5cm apart and completes 40 oscillations in 1min whats its max speed? Please help i always get the wrong answer The answer is 0.44 but why?

Does it mean that when the percentage uncertainty gets bigger the accuracy gets bigger while I am doing the experiment? And how do you know that I have a wider range of results? Does the percentage difference have any effect on the accuracy?

Thanks for your effort but I don't really understand that. :( I still don't know if percentage uncertainty is a measure of accuracy? And how do percentage uncertainty and percentage difference affect the accuracy of an experiment?

hello I have some questions which I was struggeling with 1. Is percentage error the same as percentage uncertainty? Because percentage error is a measurement of accuracy and is percentage uncertainty also a measure of accuracy? 2. How do percentage uncertainty and percentage difference affect...

Ok I understand what you are saying but can you also answer the last bit of my question with the calculation please :) And does 0.550 actually have 2 or 3 sf? And how do I know that 0.2 is an exact known number- this value is just given in the equation ? thanks

When you say 0.6 is an exact known number is that the same as saying it's a constant? And are you trying to tell me that a constant doesn't affect the final result ? Am i right? If I would have this example: (0.333)(0.550)/0.2 where 0.2 is the value already given in the...

sorry to ask again but is it right what I have understood so far. When I 've got y=0.6zx then you get x=y/0.6z At school we measured y and z to 3 sf. So does it mean that 0.6 is kind of a constant value and it doesn't affect the value of x which I am trying to work out? Because I didn't work...

but in my equation the 0.6 is an exact known number and all the other numbers are measured to3 sf how about now?

Oh I think I understand . But say the equation was y=0.6zx so x= y/0.6z x and y are given to 3 s.f But the 0.6 is just given to 1 s.f. will x still have 3 s.f. or does the 0.6 affect the number of s.f of x?

thanks but that's not actually what i mean with my x- value. the x value was an unknown in an equation and i had to work out this x value. it represents the mass of a mug. then after i have made the x value the subject of my equation they ask me that question which i have written in my first...

hi we did an experiment at school and in my homework i am asked to justify the number of significant figures for x. what do they mean with justify here? i don't understand the question. my x value has 3 s.f. thanks in advance

I know what terminal v is I am just confused because here you say that the terminal v decreases but in the previous post you said it's just normally accelerating downwards. Sorry but can you maybe explain that again? :blushing:

Do you mean that there is no terminal v at all?