PLEASE ANSWER THE FOLLOWING MULTIPLE CHOICE QUESTIONS. I BOLDED MY ANSWERS BUT I AM NOT SURE IF THEY ARE CORRECT.

1. A 20.0 kg lead shot is heated to 90.0^oC and dropped into a calorimeter containing 0.50 kg of water at 20.0^oC. What is the common final temperature of water and lead shot? [The specific heats of lead is

128 J/kg ^oC, and of water is 4186 J/ kg ^oC]

a. 20.8^oC

b. 42.1^oC

c. 22.4^oC

d. 27.8 C

2. Which of the following materials is the poorest thermal conductor?

a. Ice

b. Wood

c. Air

d. Wool

3. On a hot summer day, and outdoor sign reports that the temperature is 44^oC. What is the temperature in degrees Fahrenheit?

a. 99

b. 120

c. 111

d. 79

4. An ideal gas is maintained at a constant pressure. At a temperature of 30.0^oC, the volume of the gas is 1.50 m³. If the number of molecules of the gas is kept constant and the temperature is raised to 75.0^oC, what is the new volume of the gas?

a. 1.30 m³

B. 2.45 m³

c. 1.72 m³

d. 3.75 m³