Physics Unit 1 Flashcards
G
Giga, 1X10^9
T
Tetra, 1X10^12
M
Mega, 1X10^6
k
Kilo, 1X10^3
h
Hecto, 1X10^2
c
Centi, 1X10^-2
m
Milli, 1X10^-3
ū
Micro, 1X10^-6
n
Nano, 1X10^-9
p
Pico, 1X10^-12
Study of natural phenomena
Science
Amount of material in a given space
Density
Application of the laws of science
Engineering
An early explanation of an observed event based on preliminary research
Hypothesis
A generally accepted explanation for a phenomena based on extensive research
Theory
A broad explanation for related natural phenomena
Law
The measure of the amount of material in an object
Mass
Anything that has mass and takes up space
Matter
Property of matter that states an object will continue in its current state of motion
Inertia
Name the 3 Base units
Meter, Gram, Liter
Define sig figs and name the 5 rules
Indicates accuracy of the measurement.
- All non zeros are sig
- All zeros between non zeros are sig
- Zeros on the end of a decimal are sig
- Zeros on the end of a whole number are NOT sig
- Zeros at beginning of decimal are NOT sig
Density is equal to…
Mass (or weight) divided by volume
Define force and give the formula
Created by acceleration; F=ma
Give formula if weight is a force
Fw=mass X acceleration of gravity
Acceleration of gravity is equal to…
9.8 m/s^2
Mathematical basis for metric system? Official name?
Base 10; Standard International
Why is SI the system used in science?
Base 10, easy conversions
Most recent definition of a standard meter?
Distance light travels in a vacuum over a certain amount of time
Only fundamental quantity measured by comparison of a physical object? Why?
Kilogram, still the most accurate
Original standard of a second? Updated standard?
1/86400 of a day; # of vibrations of cesium -133 atom
SI includes what standards?
Same as metric but uses Kelvin for temp.
Metric system uses what standards?
Has a decimal basis (base 10)
Temp is measured in Celsius
Name the seven fundamental Units
- Length - meters
- Mass - kilogram
- Time - second
- Temp. - kelvin
- Electric current - Ampere
- Amount of substance - mole
- Luminous intensity - Candela
Accuracy
Closeness of a measurement to actual value
Precision
Ability to repeat measurement with “same” result
Specific Gravity is the
Density of an object divided by density of water
Density of water is equal to
1 g/cm^3
1 dm^3 is equal to what?
1 Liter
1 Liter is equal to what?
1000 mL
1 cm^3 is equal to?
1 mL
Weight and is a force created by what?
Gravity
What is the SI unit for force or weight?
Newton
What is the formula for weight?
Mass (kg) X 9.8 m/s^2
