write my assignment 14810

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