physics

posted by cylinder

To calculate the young modulus uncertainty do you add together the percentage uncertainty of strain and stress and if not then what do u do. Please dont send websites just tell and help me out.

1. bobpursley

Honestly, you need to learn it, and not have someone tell you. You add and subtract, per this http://web.uvic.ca/~jalexndr/192UncertRules.pdf

2. cylinder

Please just tell me if I AM right or wrong because the website wont do that.

I think I:
-add percentage uncertainty of stress and strain together (i think this is the total percentage uncertainty so the young modlus unceratinty??)
-then i use this percentage to find no% of those 3 values, then i write those three yound modulus plus or minus this number

is this right if npot please tell me how andwhat to do instead as that webstie cant tell me and that thing is
not what we have done in lesson yet

3. bobpursley

Yes, as I understand what you are saying, you are right if your "uncertainity" is in absolute numbers. Remember, it is not possible to add 34 and .00005 .

the website is pretty clear on the division rule. Something is very wrong if you can't see that in the text presented in that short link "..that thing is not something we have done in class yet" is not an excuse for not understanding, when you have a question. I think we have to learn to learn beyond what a particular class or teacher presents. Reading does that. If you can't accept that, good luck in the future, I can't help you.

Similar Questions

1. PHYSICS

A proton is confined to a nucleus whose diameter is 5.5*10^-15m. If this distance is considered to be the uncertainty in the position of the proton, what is the minimum uncertainty in its momentum?
2. Physics - Uncertainties

I have to do a lab with uncertainties, I have worked out that the uncertainty of the weight of Newton weights is (±0.48g)and the time uncertainty is (±0.0005s)but how do you find the uncertainty of acceleration?
3. Physics

Suppose I measure the velocity of an object at two different times, t1 and t2. If I tell you that the uncertainty in velocity is 0.1 m/s for each point, then calculate the uncertainty in acceleration if t1 = 0.0 s and t2 = 0.01s.
4. chemistry

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 x 10(3) m/s, the uncertainty in its position is at least a)66 m b)17 m c)6.6 x 10-8 m d)1.7 x 10-8 m e)None of the above
5. chemistry

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 x 10(3) m/s, the uncertainty in its position is at least a)66 m b)17 m c)6.6 x 10-8 m d)1.7 x 10-8 m e)None of the above
6. chemistry

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 x 10(3) m/s, the uncertainty in its position is at least a)66 m b)17 m c)6.6 x 10-8 m d)1.7 x 10-8 m e)None of the above
7. Physics

a) The x-coordinate of an electron is measured with an uncertainty of 0.20 mm. What is the xcomponent of the electron’s velocity, vx, if the minimum percentage uncertainty in a simultaneous measurement of vx is 1.0%. b) Repeat part …
8. Materials Science

Aluminum is a cubic crystal, with S11=1.59×10−11 m2/N S12=−0.58×10−11 m2/N S44=3.52×10−11 m2/N What are the Young's modulus, Poisson's ratio and shear modulus, corresponding to these values?
9. PHYSICS

Calculate the stress, strain and young's modulus of a wire with a cross-sectional area of 3 x 10^-7 m^2 and a length of 0.6 m that is stretched to a distance of 1.2 x 10^-3 by a 120 N force.
10. physics

(needed for my strain calculations) is the percentage uncertainty in a ruler 0.1cm or 0.1mm?

More Similar Questions