1. Tardigrade
  2. Question
  3. Physics
  4. A steel tape gives correct measurement at 20° C. A piece of wood is being measured with the steel tape at 0° C. The reading is 25 . cm on the tape, the real length of the given piece of wood must be :

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A steel tape gives correct measurement at $20^{\circ} C$. A piece of wood is being measured with the steel tape at $0^{\circ} C$. The reading is $25\,. cm$ on the tape, the real length of the given piece of wood must be :

Solution:

$\frac{\Delta L }{ L }=\alpha \Delta t =-\alpha 20$
means read more so actual is less