- #1
chocopop
- 4
- 1
- Homework Statement
- Find the desired sum: (3±4%)+(4±0.01)
- Relevant Equations
- none
please help me
Understanding the Concept of Sum in Physics: A Beginner's Guide
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The discussion focuses on the propagation of uncertainties in physics, specifically using the formula Δz = √((Δa)² + (Δb)²) for the sum of two measurements. It emphasizes the need to convert percentage uncertainties into absolute uncertainties before applying the formula. The original poster was banned for not demonstrating effort in their homework submissions despite receiving multiple warnings. The thread has been locked to prevent further discussion. Understanding these principles is crucial for accurate calculations in physics.
- #2
etotheipi
Well, why not just use the formula for propagation of uncertainties, if ##z = a + b##, then$$\Delta z = \sqrt{(\Delta a)^2 + (\Delta b)^2}$$N.B. you need to convert the percentage uncertainty in the first measurement into an absolute uncertainty first.
- #3
BvU
Science Advisor
Homework Helper
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Check out https://www.physicsforums.com/threads/homework-help-guidelines-for-students-and-helpers.686781/ and post your attempt at solution.
The sum is 7 
, but what have you learned about handling uncertainties ?
, but what have you learned about handling uncertainties ?- #4
berkeman
Admin
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OP has been banned for repeatedly posting homework with zero effort shown, even after multiple warnings. Have a nice day. Thread is locked.
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