(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

What is the mass uncertainty, [tex]\delta[/tex]m = m^{+}- m, of the particle?

2. Relevant equations

m = [tex]\frac{R*|q|*B}{v}[/tex]

where

R = (6.4[tex]\pm[/tex]0.1) cm (convert to meters so 0.064[tex]\pm[/tex]0.001)

|q| = 1.6*10^{-19}

B = (2.50[tex]\pm0.02[/tex]) T

v = (5.25[tex]\pm0.04[/tex])x10^{7}

3. The attempt at a solution

I figured out that m = m = 4.88*10^{-28}kg

When I tried to find the upper limit I got 4.95x10^{-28}

and the lower limit, 4.80x10^{-28}

My professor's answer sheet says that m^{+}= 5.03 x 10^{-28}kg

and [tex]\delta[/tex]m = 0.2x10^{-28}kg.

First of all, I don't know how he determined that [tex]\delta[/tex]m = 0.2x10^{-28}kg. Can someone help me?

Second of all, if m = (4.88*10^{-28}kg) and [tex]\delta[/tex]m = 0.2x10^{-28}kg then shouldn't m^{+}= 5.08 x 10^{-28}kg?? NOT 5.03 x 10^{-28}kg??

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Easy question calculating uncertainty

**Physics Forums | Science Articles, Homework Help, Discussion**