One section of a steel railroad track is 25 meters long, if its temperature increases by 40 K during the day, how long does the track expand?
- One section of a steel railroad track is 25 meters long, if its temperature increases by 40 K during the day, how long does the track expand? The coefficient of linear thermal expansion of steel 12 106 per Kelvin
a. 12×10^6m
b. 12×10^4m
c. 12×10^3m
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2. Approximately how many moles of gas molecules are in the classroom
- 5×10^4moles
- 2×10^moles
- 9×10^3moles
- 1×10^3 moles