Don't Graph Too Hard
Units Make the World Go Round
Physics Labs, Not Dog Labs
The Need For Speed
5
What is the difference between and independent and dependent variable?
The independent variable is the variable that is controlled directly by the experimenter. This changes the dependent variable.
5
Given the measurement Volume = 32m^3 , what is the physical quantity?
Volume
5
What are the 3 parts of a written conclusion?
Why you did the lab (purpose), what you learned (data), and any sources of error (analysis).
5
How do we find average speed? Why is it called average?
average speed = distance / time
10
What is the proper graph title for this graph?
The format used should follow "y vs. x" so in this case, the title should be "Distance vs. Time"
10
What is the standard, or base, (SI) unit for mass?
The kilogram (kg)
10
How many significant figures should be in the answer for the following equation?
3.66 + 3.2
2 sig figs
When we add or subtract, we round to the least number of decimal points.
3.66 + 3.2 = 6.86 = 6.9
10
How do we find our instantaneous speed in everyday life?
Use a tool; speedometer, radar gun, etc.
15
Given the equation C=2pir what would the shape of that graph be?
A linear shape as this equation follows the format y=mx+b with b=0.
15
Give an example of a derived unit?
A unit that combines 2 or more standard (base) units. For example, speed in meters/sec is a combination of distance in meters and time in seconds.
15
Why do we want to change only 1 independent variable in an experiment?
If we change more than 1 variable, and the dependent variable changes, we don't know which change cause the shift in the dependent variable.
15
What is the difference between speed and velocity?
Velocity is the vector quantity of speed and has a direction.