Solution to

The following chart shows conversions using U.S. weights. The weights

Frame 4-32.

are the avoirdupois system, which is the common weighing system for

commerce. There are other systems of weights such as the

a. 0.35

apothecaries' (for pharmacy) and troy (used for precious metals such as

gold). The avoirdupois, apothecaries' weight, and troy weight systems

b. 1.285

are based upon the grain, which is the same in all three systems. In the

avoirdupois system, a pound equals 7,000 grains and is divided into 16

c. 250

ounces. In the apothecaries' and troy systems, a pound equals 5,760

grains and is divided into 12 ounces.

d. 1,000,000

e. 2200

Grain

Ounce

Pound

Metric

f. 1.12

1

0.0023

0.00014

64.8 mg

437.5

1

0.0625

28.35 g

7,000

16

1

454 g (0.454 kg)

1 grain = 64.8 milligrams

20 grains = 1 scruple (1.3 grams)

3 scruples = 1 dram (3.9 grams)

8 drams = 1 ounce (31.1 grams)

12 ounces = 1 pound (373 grams)

1 grain = 64.8 mg

480 grains = 1 ounce (31.1 grams)

12 ounces = 1 pound (373 grams)

a. Which is heavier, an ounce of iron (avoirdupois weight) or a ounce

of gold (troy weight)?

b. Which is heavier, a pound of iron (avoirdupois weight) or a pound

of gold (troy weight)?

NOTE: The U.S. weights used in Frame 4-32 are the common

avoirdupois weights.

NOTE: In this subcourse, the avoirdupois system of weights is used

when referring to the U.S. Customary System of weights.

_______________________________________________________________________________________

MD0900

4-16

Integrated Publishing, Inc. |