Question
There is a hole in the middle of a copper plate. When heating the plate, diameter of hole would(a) always increase(b) always decrease(c) remains the same(d) none of these
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A large flat slab of metal at temperature T0 has a hole in it. The metal is warmed to a new temperature T > T0. Upon warming, the area of the hole will (a) increase. (b) decrease. (c) remain the same size. (d) possibly change the size, depending on the shape of the hole.
A circular hole is made in a steel square plate. The plate is now heated and allowed to expand. Which of the following statements is correct? (a) Radius of the hole starts to decrease. (b) Radius of the hole starts to increase. (c) Radius of the hole will remain constant. (d) Nothing can be said about change in radius of the hole because ratio of initial radius of hole to initial dimension of the plate is not known.
Thermometry and Thermodynamics
Section B
A square hole $8.00 \mathrm{cm}$ along each side is cut in a sheet of copper. (a) Calculate the change in the area of this hole resulting when the temperature of the sheet is increased by $50.0 \mathrm{K} .$ (b) Does this change represent an increase or a decrease in the area enclosed by the hole?
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