Astronomy
Line 29: Line 29:
 
:::(see "The Chart")
 
:::(see "The Chart")
   
:F. Conversions
+
:F. Measuring
 
::1. Issues to consider before you start measuring
 
::: Concept:
 
::: Units:
 
::: Scale
 
:::: Smallest amount that can be measured:
 
:::: Largest amount that can be measured:
 
:::: Increment:
 
:::: Precision:
 
::2. Issues to consider while measuring
 
::: Parallax
 
::: Meniscus
 
::: “Burning an inch”
 
::: Estimation
 
::3. Measuring Mindset
 
::: a. Measure and record the "at least"
 
::: b. Estimate 1 more digit
 
::: c. Record correct units
  +
  +
:G. Conversions
 
::4/4 = 1
 
::4/4 = 1
 
::25 X 1 = 25
 
::25 X 1 = 25
 
::...
 
::...
   
:G. Metric Conversions ...
+
:H. Metric Conversions ...
   
:H. Scientific Notation
+
:I. Scientific Notation
 
::1.Rules
 
::1.Rules
 
:::always write number with one digit to the left of the period
 
:::always write number with one digit to the left of the period
Line 47: Line 66:
 
::2.Examples
 
::2.Examples
   
:I. Significant Digits (sig fig)
+
:J. Significant Digits (sig fig)
 
::1)Precision vs. Accuracy
 
::1)Precision vs. Accuracy
 
::2)The measuring device determines the precision of the measurement.
 
::2)The measuring device determines the precision of the measurement.
Line 55: Line 74:
 
::: 4160s (3) 45.5mL
 
::: 4160s (3) 45.5mL
   
:J. Problem Solving strategy
+
:K. Problem Solving strategy
 
::Read the problem
 
::Read the problem
 
::Make a prediction including units
 
::Make a prediction including units
Line 64: Line 83:
 
::Calculate and simplify units
 
::Calculate and simplify units
 
::Verify - are those the units you expected? Does the answer make sense?
 
::Verify - are those the units you expected? Does the answer make sense?
 
:K. Measuring
 
::1. Issues to consider before you start measuring
 
::: Concept:
 
::: Units:
 
::: Scale
 
:::: Smallest amount that can be measured:
 
:::: Largest amount that can be measured:
 
:::: Increment:
 
:::: Precision:
 
::2. Issues to consider while measuring
 
::: Parallax
 
::: Meniscus
 
::: “Burning an inch”
 
::: Estimation
 
::3. Measuring Mindset
 
::: a. Measure and record the "at least"
 
::: b. Estimate 1 more digit
 
::: c. Record correct units
 
   
 
:L. Graphing in Physics
 
:L. Graphing in Physics

Revision as of 18:49, 25 January 2010

A. Define
Physics-
Equilibrium-
B. Scientific Methods – the Big Lie - these methods allow us to say "This is what we think is true, based on current information."
  1. Problem, usually stated as a question
  2. Hypothesis- an educated guess, that can be tested
  3. Experiment
  4. Theory- an explanation that has been tested
- - - - - - - - - - -
Law-
C. Experimental Design
Independent variable-
Dependent variable-
Control Group-
Bias-
D. Units- a noun that follows a number to explain a measurement
meter --> distance
meters squared --> Area
Liter = dm3 -->Volume
second --> time
gram = mass of 1mL of water
Define: Length, Area, Volume, mass
Compare/contrast mass and volume
List comparing English and SI units...
E. Affixes
(see "The Chart")
F. Measuring
1. Issues to consider before you start measuring
Concept:
Units:
Scale
Smallest amount that can be measured:
Largest amount that can be measured:
Increment:
Precision:
2. Issues to consider while measuring
Parallax
Meniscus
“Burning an inch”
Estimation
3. Measuring Mindset
a. Measure and record the "at least"
b. Estimate 1 more digit
c. Record correct units
G. Conversions
4/4 = 1
25 X 1 = 25
...
H. Metric Conversions ...
I. Scientific Notation
1.Rules
always write number with one digit to the left of the period
if num >= 10, exp is positive
if num <1, exp is negative
if 1>= num <10, exp is 0
-------------------------------------
if exp is positive, move decimal to right
if exp is negative, move decimal to left
2.Examples
J. Significant Digits (sig fig)
1)Precision vs. Accuracy
2)The measuring device determines the precision of the measurement.
3)Measurements must make sense for that given situation
Examples:
4016m (4) 55mph
4160s (3) 45.5mL
K. Problem Solving strategy
Read the problem
Make a prediction including units
Take inventory - What do we know and what do we need to know?
Choose an equation
Solve for x
Substitute
Calculate and simplify units
Verify - are those the units you expected? Does the answer make sense?
L. Graphing in Physics
includes the slope equation
M. Relationships
1. Linear (Direct)
2. Reciprocal (Inverse)
3. Exponential (Quadratic)
The truth: In the real world graphs are a combination of 1-3
N. Vectors
1.Define through examples
Equilibrium = Net Force (¹) = No acceleration (1D)
2.Vector Addition using Graphical Method
3.Vector Addition using Analytical methods