Question

Phy222BS Ch1-Ch3 Review 2019 spring 1. The temperature changes from 35°F during the night to 75 F during the day What is the temperature change on the Celsius scale? A)72oC B)40°C Answer: D 32 D) 22 c The coefficient of linear expansion of steel is 12 X 10-6 K.. what is the change in length of a 25-m steel bridge span when it undergoes a temperature of 40 K? A) 1.2 cm Answer: A B) 1.4 cm C) 1.6 cm D) 1.8 cm E) 2.0 cm 3. An ideal gas in a container of volume 100 cm3 at 20 C has a pressure of 100 N/m. Determine the number of gas molecules in the container A) 2.4 x 106 B) 4.2x 106 C) 6.0x 102 D)2.5 X 10 E)S.2X 101 Answer: D 4. A 425-g piece of metal at 100°C is dropped into a 100-g aluminum cup containing 500 g of water at 15 °C. The final temperature of the system is 40°C. What is the specific heat of metal, assuming no heat is exchanged with the surroundings? The specific heat of aluminum is 900 J/(kg.K). A) İ 900 J/(kg.K) B) 2 I 40 J/(kg«K) C) 3300 J/kg«K) D) 3800 JOkg.K) Answer: B 5. Two metal rods, one silver and the other gold, are attached to each other. The free end of the silver rod is connected to a steam chamber, with a temperature of 100°C, and the free end of gold rod to an ice water bath, with a temperature of 0°C. The rods are 5.0 cm long and have a square cross-section, 2.0 cm ona side. How much heat flows through the two rods in 60 s? The thermal conductivity of silver is 4 i 7 W/(m«K), and that of gold is 291 W/on.K). No heat is exchanged between the rods and the surroundings, except at the ends. A) 8.2 KJ B)9.5 KJ C)12 KJ D) 14 KJ E) 16 KJ Answer: A A liquid has a maximum density of 1 gCm3 at 4°C. At lOoC, its density is 0.9997 g/em2. What is ß for this liquid over this temperature interval? Answer in units of c A) 0.3xlo3oc' B)5.0x10°C C)6.0x10 C D) 0.1 6.

Answer 1

Allowed to solve only one question.I have solved the first 2.