3. A rod 2 m long expands 1 mm when heated from 8 C to 70C. What is the coefficient of linear expansion of the material from which the rod is made? 4. A rectangular brass plate has a dimension of 50 cm x 30 cm at 10 C. At what temperature should it be heated to increase its area by 0.05 mm~? 5. A Pyrex beaker is filled to the brim with 250 ml of glycerin at 15 C. How much glycerin overflows at 25 C