- #1
sai2020
- 26
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The question is
Mercury has a thermal expansion coefficient (volume) of about 1/5500 perKelvin. Estimate the inner diameter of the thermometer tube.
Here's my attempt.
L [tex]\approx[/tex] 30cm
V = 2*pi*r^2*L
Change in volume at 0 C and 110 C approximately equal to V
=> 110/5500 = r^2(3*pi/5)
=> r = sqrt(1/30*pi) [tex]\approx[/tex] 0.10m
I am well known to make crazy errors but I can't find out where that is over here
Mercury has a thermal expansion coefficient (volume) of about 1/5500 perKelvin. Estimate the inner diameter of the thermometer tube.
Here's my attempt.
L [tex]\approx[/tex] 30cm
V = 2*pi*r^2*L
Change in volume at 0 C and 110 C approximately equal to V
=> 110/5500 = r^2(3*pi/5)
=> r = sqrt(1/30*pi) [tex]\approx[/tex] 0.10m
I am well known to make crazy errors but I can't find out where that is over here