- #1

LBRRIT2390

- 29

- 0

## Homework Statement

What is the mass uncertainty, [tex]\delta[/tex]m = m

^{+}- m, of the particle?

## Homework 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}

## 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??