[ريم علي الشهري]

Chapter 1. Measurement

1. The SI unit of time is the
A. hour
B. second
C. minute
D. ampere

2. The diameter of an atom is approximately 1 ´ 10-7 mm. What is this diameter when expressed in nanometers?

A.​1 ´ 10-18 nm
B.​1 ´ 10-15 nm
C.​1 ´ 10-9 nm
D.​1 ´ 10-1 nm

3.​6.0 km is how many micrometers?

A.​6.0 ´ 106 µm
B.​1.7 ´ 10-7 µm
C.​6.0 ´ 109 µm
D.​1.7 ´ 10-4 µm

4.​The SI prefixes giga and micro represent, respectively:

A.​10-9 and 10-6.
B.​106 and 10-3.
C.​103 and 10-3.
D.​109 and 10-6.

5.​Which of these quantities represents the largest mass?

A.​2.0 ´ 102 mg
B.​0.0010 kg
C.​1.0 ´ 105 mg
D.​2.0 ´ 102 cg


6. Ammonia boils at -33.4°C. What temperature is this in °F?
A.​-60.1°F
B.​-92.1°F
C.​-28.1°F
D.​+13.5°F







مفتاح الإجابات
1/b
2/d
3/c
4/d
5/d
6/c