A thin straight rod made of an unknown metal has an length of exactly 30.00 cm at 15°C When heated to 95°C, the rod lengthens by 0.041 cm. Determine the coefficient of linear thermal expansion a of the metal. O (2.5 x 10-5)C O (1.7 × 10-5)/C O (2.1 x 10-5)/C O (1.3 × 10-5)/C (9.4 x 10-4)/C

U7

A cube of ice is taken from the freezer at -8.8°C and placed in a 104 g iron cup filled with 279 g of water. Both the water & the cup are at 23.9°C. Eventually the system reaches thermal equilibrium at 12.4°C. Determine Qcup, Qwater (for the water initially in the cup), Qice, & the mass of the ice.Qcup = Qwater = Qice = mice =

A 1 kg bar of copper is heated at atmo- spheric pressure of 1.013 x 105 N/m². If its temperature increases from 14°C to 54°C, find the work done by the copper. The linear expansion coefficient of copper is 1.7 x 10-5 (°C)¹, its density is 8920 kg/m³ and its specific heat is 387 J/kg. ° C. Answer in units of J. part 2 of 2 What quantity of thermal energy is trans- ferred to the copper in this process? The specific heat of copper is 387 J/kg.° C. Answer in units of J.