Studied by 5 people
significant
Non-zero digits are always _____
significant
Captive zeroes are always ______
significant
All final zeros after the decimal point are
not significant
Leading zeroes are _______
Significant Figures
This consists of all the digits known with certainty plus one more digit that is uncertain or estimated.
Less than 5
If the number after the last sig. fig is: drop and leave the numbers unchanged.
Greater than 5
If the number after the last sig. fig is: add 1 to the last significant number.
added & subtracted
When measurements are _____ or _____, the answer cannot have more decimal place than those in the least accurate measurement.
multiplication and division
The product contains the same number of figures as the number containing the least sig figs used to obtain it.
Measurement
Is the process of quantifying the properties of an object.
Unit
A fixed quantity with respect to physical quantity is measured is called a _____.
International System of Units (SI)
is the modern form of the metric system and
the world's most widely used system of
measurement.
Physical Quantities
any number that is used to describe a physical phenomenon
Area
(Length x Length)
Volume
(Length x Length x Length)
Speed
(Length / Time )
Force
(Mass x (Length / Time / Time)
Metric System
● Used by the rest of the
world.
● base-10 system.
● Variation : mks and the
cgs sytem
● mks : meter, kilogram,
seconds
● cgs: centimeter, gram ,
seconds.
English System
● Known as customary
system of measurement
● Used in the United States,
Burma and Liberia.
● Also known as the fps
sytem.
● fps : foot , pounds ,
seconds.
System Units
Metric System and English System
SI Units
Based Units and Derived Units
Based Units
Lengths, mass, time, electric current, temperature, amount of substance and luminous intensity.
Derived Units
speed, acceleration, density , work and energy. ed, acceleration
, d
Unit Prefixes
or metric prefix can be used to make a new unit larger or smaller in the base unit.
Note
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