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問題一覧
1
The fundamental unit of the metric system
Meter.
2
What are the three fundamental dimensions
Length, Mass, Time.
3
the fundamental unit on which are based all metric standards and measurements of length and area and of volumes derived from linear measurements
Meter.
4
The measurable quantity, is also derived from length.
Volume.
5
The standard of mass is the kilogram.
Mass.
6
platinum-iridium block preserved at the Bureau of weights and Measures.
Mass.
7
A push or pull required to set a body in motion.
Force.
8
The larger the mass of the body and the greater the required acceleration, the greater the force that one must exert.
Mass.
9
Defined as force per unit area; the unit commonly used in science is dyne/cm.
Pressure.
10
Pressure is often given in atmospheres (atm) or in centimeters or millimeters of mercury.
Pressure.
11
frequently defined as the condition of a body that gives it the capacity to do work.
Work and energy.
12
classified as kinetic energy or potential energy.
Work and energy.
13
Zero degree on the centigrade scale equals 273.15 on the Kelvin Scale.
Temperature.
14
assigned a unit known as the degree.
Temperature.
15
What are the three types of density
Apparent density, Absolute density, Relative density.
16
The ratio of the mass of an object, determined in or referred to a vacuum, at a specified temperature, to the volume of the object at the same temperature.
Absolute density.
17
Mass in grams /Volume in millimeter
Absolute density.
18
differs from absolute density only in that the mass of the object is determined in air;
Apparent density.
19
If the object and masses are made of the same material, or have the same density, there will be no difference in the buoyant effect, and the apparent density will be identical with the absolute density. (True/False)
True.
20
an expression sometimes employed to indicate the mass of 1 mL (not cc, which is very slightly different) of a standard substance, such as water, at a specified temperature, relative to water at 4°C taken as unity.
Relative density.
21
may be defined as the ratio of the mass of a substance to the mass of an equal volume of another substance taken as the standard.
Specific gravity.
22
Errors that although sometimes unsuspected, may be avoided or determined and corrected once they are uncovered
Determinate.
23
The results of a series of tests will yield a random pattern around an average or central value, known as the mean
Indeterminate.
24
Arise from random fluctuations in the temperature or other external factors and from the variations involved in reading instruments. It can be corrected by careful analysis and refinement of techniques
Variable determinate errors.
25
A measure of the agreement among the values in a group of data
Precision.
26
The agreement between the data and the true value
Accuracy.
27
the lowest and highest value
Range.
28
the average deviation from the mean
Standard deviation.
29
more useful in comparing variability.
Coefficient of variation percent.
30
What is the equipment use to measure length?
Vernier caliper.
31
Atmosphere is measured using?
Barometer.
32
Vapor pressure is measured using?
Manometer.
33
What is the standard for gas law?
Kelvin.
34
For specific gravity of liquid containing Mercury or lead to make it buoyant.
Hydrometer.