Significant Figures
Units
Unit Conversion
Variables
Speed and Distance
100
Here is a number: 240,000 Would you use the Atlantic or Pacific rule to determine its sig figs?
Atlantic because the decimal is Absent
100
What is a unit for distance or length?
meter, centimeter, kilometer, foot, inch, mile, yard, etc.
100
What must units have in common if you can convert between them? (i.e. feet to meters vs. inches to gallons)
They must measure the same thing (distance, weight, volume, etc.)
100
t
Time
100
What is the difference between speed and velocity?
Speed is a Scalar (# with no direction)
Velocity is a Vector (# with direction
200
How many sig figs are in this number: 6.767
4
200
What is the most common unit for speed in the United States?
Miles per hour, mph, or mi/hr
200
How do we cancel out units in the top of a unit conversion train track?
Put them in the bottom with our conversion
200
d
Distance
200
What is the speed of an entire trip, including stops?
Average speed
300
How many sig figs are in this number: 676,767
6
300
What is the most common scientific unit for speed?
m/s or meters per second
300
Convert 17.22 centimeters to inches
1 in = 2.54 centimeters
6.780 in
300
v
Velocity
300
What is the speed at a single moment of a journey?
Instantaneous speed
400
How many sig figs are in this number: 0.06767676
7
400
What units do they use in the majority of the world?
Imperial units (miles, inches, feet, pounds, gallons)
SI units (meters, centimeters, kilograms, liters)
SI units
400
Convert 6,700,000 centimeters into kilometers
1 km = 1000 m
1 m = 100 cm
67 km
400
a
acceleration
400
What tells you how fast something is going on a distance vs. time graph?
The slope
500
Round your answer to the correct number of sig figs:
26 * 2.58
67
500
What unit do we use for acceleration?
m/s2 or meters per second squared
500
Convert 45 m/s to ft/min
1 m = 3.28 ft
1 min = 60 s
8856 ft/min
500
p
Momentum
500
What section of the graph represents the person stopped or not moving?
B