Nothing Final Numbers to Know

car mass

1.5 × 10³ kg

1 Cal =

4 × 10³ J

human mass

10² kg

2 mi/hr =

1 m/s

Earth radius

6 × 10^6 m

eV/reactant

1.5 eV

J/eV

2 × 10^-19 J

LED light power

4 W

s/hr

3.6 × 10³ s

H molar mass

1 g/mol

C molar mass

12 g/mol

O molar mass

16 g/mol

Cal/g fat

9 Cal

Cal/g carb/protein

4 Cal

volume gas tank

60 L

liquid kg/L

1 kg/L

$/kwhr

$0.1/kwhr

kW/circuit

1.5 kW

electricity cost/month

$150

kW/family

1.5 kW

sun W/m²

1.4 × 10³ W/m²

s/year

3 × 10^7 s

US electrical power

6 × 10^11 W

usable solar E/m²

14 W/m²

US land area

10^7 km²

speed of light

3 × 10^8 m/s

cars in US

10^8 cars

mi driven/year

10^4 mi

m/mi

1.6 × 10³ m

lightyear distance in miles

6 × 10^12 mi

lightyear in meters

10^16 m

volume of gas used by car over life

6 × 10³ L

car mpg

20 mpg

L/gal

4 L

L/m³

10³ L

$/gal gas

$4/gal

annual car cost

$10000

gas J/gal

1.6 × 10^8 J/gal

cups/gal

16 cups

Earth mass

6 × 10^24 kg

moon radius

10^6 m

distance between moon and Earth

3.6 × 10^8 m

distance between sun and Earth

1.5 × 10^11 m

Sun radius

7 × 10^8 m

Sun mass

10^30 kg

Earth orbital speed

3 × 10^4 m/s

Jupiter radius

7 × 10^7 m

sun luminosity

4 × 10^26 J/s