Chapter 1: MEASUREMENT
- The SI standard of time is based on:
- the daily rotation of the earth
- the frequency of light emitted by Kr86
- the yearly revolution of the earth about the sun
- a precision pendulum clock
- none of these Ans:E
- A nanosecond is:
- 109 s
- 10−9 s
- 10−10 s
- 10−10 s
- 10−12
Ans: B
- The SI standard of length is based on:
- the distance from the north pole to the equator along a meridian passing through Paris
- wavelength of light emitted by Hg198
- wavelength of light emitted by Kr86
- a precision meter stick in Paris
- the speed of light Ans: E
- In 1866, the U. S. Congress defined the U. S. yard as exactly 3600/3937 international meter. This was done primarily because:
- length can be measured more accurately in meters than in yards
- the meter is more stable than the yard
- this definition relates the common S. length units to a more widely used system
- there are more wavelengths in a yard than in a meter
- the members of this Congress were exceptionally intelligent
Ans: C
- Which of the following is closest to a yard in length? A. 0.01 m
- 0.1m
- 1 m
- 100 m
- 1000 m
Ans: C
- There is no SI base unit for area because:
- an area has no thickness; hence no physical standard can be built
- we live in a three (not a two) dimensional world
- it is impossible to express square feet in terms of meters
- area can be expressed in terms of square meters
- area is not an important physical quantity Ans: D
- The SI base unit for mass is:
- gram
- pound
- kilogram
- ounce
- kilopound Ans: C
- A gram is:
- 10−6 kg
- 10−3 kg
- 1 kg
- 103 kg
- 106 kg
Ans: B
- Which of the following weighs about a pound?
- 0.05 kg
- 0.5 kg
- 5 kg
- 50 kg
- 500 kg
Ans: D
- 5.0 × 105 + 3.0 × 106 =
- 8.0 × 105
- 8.0 × 106
- 5.3 × 105
- 3.5 × 105
- 3.5 × 106
Ans: E
- The number of significant figures in 0.00150 is:
- 2
- 3
- 4
- 5
- 6
Ans: B
- The number of significant figures in 15.0 is:
- 1
- 2
- 3
- 4
- 5
Ans: C
- 3.2 × 2.7 =
- 9
- 8
- 8.6
- 8.64
- 8.640
Ans: C
- 1.513 + 27.3 =
A. | 29 |
B. | 28.8 |
C. | 28.9 |
D. | 28.81 |
E. | 28.813 |
( | )Ans: B |
- 1 mi is equivalent to 1609 m so 55 mph is:
- 15 m/s
- 25 m/s
- 66 m/s
- 88 m/s
- 1500 m/s Ans: B
- A right circular cylinder with a radius of 2.3 cm and a height of 1.4 m has a volume of: A. 0.20 m3
- 0.14 m3
- 9.3 × 10−3 m3
- 2.3 × 10−3 m3
- 7.4 × 10−4 m3
Ans: D
- A right circular cylinder with a radius of 2.3 cm and a height of 1.4 cm has a total surface area of:
- 1.7 × 10−3 m2
- 3.2 × 10−3 m2
- 2.0 × 10−3 m3
- 5.3 × 10−3 m2
- 7.4 × 10−3 m2
Ans: D
- A cubic box with an edge of exactly 1 cm has a volume of: A. 10−9 m3
- 10−6 m3
- 10−3 m3
- 103 m3
- 106 m3
Ans: B
- A square with an edge of exactly 1 cm has an area of: A. 10−6 m2
- 10−4 m2
- 102 m2
- 104 m2
- 106 m2
Ans: B
- Suppose A = BC, where A has the dimension L/M and C has the dimension L/T. Then B
has the dimension:
- T/M
- L2/TM
- TM/L2
- L2T/M
- M/L2T
Ans: A