(I) Super InvarTM, an alloy of iron and nickel, is a strong material with a very low coefficient of thermal expansion (0.20 x 10-/C°). A 1.8-m-long tabletop made of this alloy is used for sensitive laser measurements where extremely high tolerances are required. How much will this alloy table expand along its length if the temperature increases 6.0 C°? Compare to tabletops made of steel.

64. (II) A pressure cooker is a sealed pot designed to cook food with the steam produced by boiling water somewhat above 100°C. The pressure cooker in Fig. 13-32 uses a weight of mass m to allow steam to escape at a certain pressure through a small hole (diameter d) in the cooker's lid. If d = 3.0 mm, what should m be in order to cook food at 120°C? Assume that Weight (mass m) m atmospheric pressure outside the cooker is 1.01 X 105 Pa. Diameter d FIGURE 13-32 Problem 64. Steam Water Water

(II) To what temperature would you have to heat a brassrod for it to be 1.5% longer than it is at 25°C?

(iv) Heated brass rod cools slower than heated aluminum rod. This mean the specific heat of aluminum is brass. (a) More than (b) Less than (c) Same as (d) Cannot predict because AT is not given

(II) During exercise, a person may give off 185 kcal of heatin 25 min by evaporation of water (at 20°C) from the skin.How much water has been lost?

(I) To what temperature will 8200 J of heat raise 3.0 kg ofwater that is initially at 10.0°C?

(I) What is the specific heat of a metal substance if 135 kJof heat is needed to raise 4.1 kg of the metal from 18.0°C to37.2°C?

(II) To make a secure fit, rivets that are larger than therivet hole are often used and the rivet is cooled (usuallyin dry ice) before it is placed in the hole. A steel rivet1.872 cm in diameter is to be placed in a hole 1.870 cm indiameter in a metal at 22°C. To what temperature must therivet be cooled if it is to fit in the hole?

(II) A certain car has 14.0 L of liquid coolant circulating at a temperature of 93°C through the engine's cooling system. Assume that, in this normal condition, the coolant com- pletely fills the 3.5-L volume of the aluminum radiator and the 10.5-L internal cavities within the aluminum engine. When a car overheats, the radiator, engine, and coolant expand and a small reservoir connected to the radiator catches any resultant coolant overflow. Estimate how much coolant overflows to the reservoir if the system goes from 93°C to 105°C. Model the radiator and engine as hollow shells of aluminum. The coefficient of volume expansion for coolant is ß = 410 × 10-6/C°.