3a
What are 3 things that instruments do
Extend, refine, and substitute for human senses
List 3 sources of measurement error
Instrument may not align directly with the dimensions, Instrument may be defective from manufacturing, damage, or wear, Conditions during measurement can interfere
List two common units for weight and their lbf
Newton-1n=0.224 lbf, ton-1t=2000 lbf
What is mass
the measure of the inertia of matter in an object
What is a standard
A known quantity that everyone agrees
What are some examples of Quantitative data
Water temperature, time of an event
Is it true that every measurement contains error
true
List two common units for mass and their lbf
kilogram-1kg=1000g, gram -
What is quantitative data
numerical scientific observations that result from measurements with instruments
What is measurement
The comparison of a dimension of an object or substance to an appropriate standard
What are some examples of Qualitative data
Shape, color
How does a scientist eliminate error
average out the same quantity by different persons
How do we find the volume of a solid
L XW X H
What is a unit
For measuring purposes, the subdivision or portion of a dimension assigned a value of one
What is a dimension
any measurable property of the physical universe
What are some examples of Qualitative data
Kilogram-mass, second-time
What is the symbolic form of SN
M.10^n
define water displacement
dropping a solid in water and the water goes up
What is volume
The space enclosed or occupied by an object or within the boundaries of a physical system
What is Density
the mass of a substance or object contained within a stated volumetric unit
One of the two properties of a conversion factor
Equal to one
Convert: .023 kg-g
023.
What id the difference between mass and weight
Mass- amount of matter in an object, Weight-same as mass but altered by the earth's gravity
What is an Instrument
Any artificial device made for the purpose of refining, extending, or substituting for human senses
What is weight
the measure of the earth's gravity acting in on the object