1. Rod A has twice the diameter of rod B, but both are made of iron and have the same initial length. Both rods are now subjected to the same change in temperature (but remain solid). How would the change in the rods' lengths compare?
(a) Rod A > rod B.
(b) Rod B > rod A.
(c) Rod A = rod B.
(d) Need to know whether the rods were cooled or heated.
2. The linear expansion of a material depends on which of the following?
(a) The length of the material.
(b) The change in temperature of the material.
(c) The type of material.
(d) All of the above.
(e) Both (b) and (c).
3. A steel plate has a hole in it with a diameter of exactly 1.0 cm when the plate is at a temperature of 20°C. A steel ring has an inner diameter of exactly 1.0 cm at 20°C. Both the plate and the ring are heated to 100°C. Which statement is true?
(a) The hole in the plate gets smaller, and the opening in the ring gets larger.
(b) The opening in the ring gets larger, but we need the relative size of the plate and the hole to know what happens to the hole.
(c) The hole in the plate and the opening in the ring get larger.
(d) The hole in the plate and the opening in the ring get smaller.
(e) The hole in the plate gets larger, and the opening in the ring gets smaller.