# Physics

posted by Amelia

Calculate the change of volume that occure when a steel bearing with an initial volume of 1.8cm^3 is heated from 20°C to 80°C.
Tried to use the formula DeltaV/Vinitial=Beta×DeltaT but kept getting the wrong answer though my maths could be off?

1. Steve

so, show us your numbers, and maybe we can tell what went wrong.

2. Amelia

I got DeltaV=(1/12×10^-6k)(80-20)(1.8cm^3)
=1.296×10^-3cm^-3
The answer Im supposed to be getting is 3.9×10^-3cm^-3?

3. Damon

for steel coef of VOLUMETRIC expansion is
about 33 *10^-6 to 39*10^-6 depending on composition of the steel. You used I suspect 1.13 *10^-6 which is more like the LINEAR coef

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