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Exam 3, Transportation
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Gas Energy Density
4×10^7 J/KG
1 kCal
4×10³ J
Li-ion Battery Energy Density
10^6 J/kg
Carbon Atomic Mass
12g/mol
Hydrogen Atomic Mass
1g/mol
Oxygen Atomic Mass
16g/mol
Car’s MPG
20MPG
Weight of a train car
100 tons
US Population
3×10^8
U.S Road Deaths
4×10^4/year
Density of water
10³kg/m³
Solar Flux
10³w/m²
Seconds in a year
3×10^7
Molecule size
10^-10m
Drag Force
1/2CρAV²
Drag coefficient
c=1
Energy walking
100kcal/mile
Density of air
1kg/m³
Tire diameter
.5m
Tire circumference
2m
Volume of a gallon
4×10^-3m³
Gasoline Density
10³kg/m³