## Thin strips of iron and zinc are riveted together to form a bimetallic strip that bends when heated. The iron is on the inside of the bend because:

1.
Thin strips of iron and zinc are riveted together to form a bimetallic strip that bends when heated. The iron is on the inside of the bend because:
a. it has a higher coefficient of linear expansion
b. it has a lower coefficient of linear expansion
c. it has a higher specific heat
d. it has a lower specific heat
e. it conducts heat better
2.
When the temperature of a copper penny is increased by 100°C, its diameter increases by 0.17%. The area of one of its faces increases by:
a. 0.17%
b. 0.34%
c. 0.51%
d. 0.13%
e. 0.27%
3.
The same energy Q enters five different substances as heat.
a. The temperature of 3 g of substance A increases by 10K
b. The temperature of 4 g of substance B increases by 4K
c. The temperature of 6 g of substance C increases by 15K
d. The temperature of 8 g of substance D increases by 6K
e. The temperature of 10 g of substance E increases by 10K
Which substance has the greatest specific heat?
a. A
b. B
c. C
d. D
e. E
4.
The specific heat of lead is 0.030 cal/g ·°C. If 300 g of lead shot at 100°C is mixed with 100 g of water at 70°C in an insulated container determine the final temperature of the mixture. (cwater = 1.0 cal/g°C)
a. 100°C
b. 85.5°C
c. 79.5°C
d. 74.5°C
e. 72.5°C