Intro to Physics and Measurements (1) Flashcards
What is physics?
The properties, behavior, and interaction of matter and energy.
What is the language of physics?
Mathematics
What are the subdivisions of Physics?
Classical Mechanics, Thermodynamics and Statistical Mechanics, Electromagnetism, Relativity, Quantum Mechanics
What is Electromagnetism?
study of electricity and magnetism
What is Thermodynamics and Statistical Mechanics?
study of energy
What is Classical Mechanics?
study of motion
What is Relativity?
study of the relationship of electromagnetism and mechanics
What is Quantum Mechanics?
study of physics on an atomic and subatomic level
What are basic quantities?
Foundations of all quantities in physics
What are derived quantities?
Combination of basic quantities
What are the basic quantities for length?
miles, light year, cm, m, in, ft
What are the basic quantities for mass?
g, kg, lb, ton, amu
What are the basic quantities for time?
s, min, hour, day, year
What is volume?
a substance’s mass per unit volume
What is the formula for a rectangular prism’s volume?
lwh
What is the formula for a cone’s volume ?
1/3(₶)r^2h
What is the formula for a sphere’s volume ?
4/3(₶)r^3
What is the formula for a cone’s volume ?
1/3₶r^2h
What is the formula for a cylinder’s volume ?
₶r^2h
What is density?
substance’s mass per unit volume
How can you explain density relative to water?
less dense than water = float
denser than water = sink
SI unit of density?
kg/m^3
Relationship of m,v, and ρ ?
m and rho are directly proportional
v and rho are inversely proportional
What is SI?
International System or Systeme Internationale d’ Unites
Length in SI and US Customary System
meter (m) in SI, foot (f) in US
Time in SI and US Customary System
seconds (s) in SI and US
Mass in SI and US Customary System
kg (kilogram) in SI and slug (lb s^2/ft) in US
Force in SI and US Customary System
Newton (N) in SI and pounds (lb ) in US
Si prefixes
tera, mega, giga, kilo, hecto, deca, deci, centi, mili, micro, nano, pico
1 mi in ft
5280 ft
1 kg in pounds
2.2
How many minutes in a year?
525,600
How many seconds in a day ?
86, 400
cc?
cubic centimeter
What is a scalar measurement?
quantity measured by magnitude alone
What is a vector?
quantity described by magnitude and direction
Properties of a vector?
Magnitude (length), Direction (where it is pointed)
Represents a vector
A ray
Parts of a ray
point (tail or origin)
head (pointed to a particular direction)
Direction can be represented in two ways, what are they?
four primary directions, angles
12 directions
North, East of North, North of East, East, South of East, East of South, South, West of South, South of West, West, North of West, West of North
Angles of Direction
East (0 degrees)
North (90)
West (180)
South (270)
Where are they headed, parallel vectors?
same direction
Where are they headed, anti-parallel vectors?
same direction
Two ways of vector addition?
Graphical and Component
Sum of V1 and V2
resultant
in a 30-60-90 triangle, what is the value of the side opp 30 and the side opp 60?
opp 30 - 1/2 (side opp 90)
opp 60 - sqrt3/2 (side opp 90)
