## Homework Statement

At 30.3C, the resistance of a segment of gold
wire is 124.9 omega When the wire is placed in a
liquid bath, the resistance decreases to 97.5 omega
What is the temperature of the bath?
The temperature coefficient for gold is
0.0034 (C)−1 at 20C.

## Homework Equations

used R=Ro[1+alpha(t-to)

## The Attempt at a Solution

I got -34.2, but the hw says its incorrect

Related Introductory Physics Homework Help News on Phys.org
gneill
Mentor
Hmm. The numbers look okay to me. Did you include the units when you answered?

Hmm. The numbers look okay to me. Did you include the units when you answered?
yes do you think it could be wrong because of sigfigs so it be -34.22

gneill
Mentor
How many significant figures do each of the provided numbers have?

To has 3
Ro has 4
R has 3
alpha has 4

gneill
Mentor
Check http://www.usca.edu/chemistry/genchem/sigfig.htm" [Broken].

Last edited by a moderator:
ok i put in -34.22 but, it is still wrong

gneill
Mentor
-34.22 has four significant figures. The temperature coefficient has fewer.