Formulas
Length
1 in = 25.4 mm
1 mm = 0.039 in
1 cm = 0.394 in
1 m = 39.37 in
1 ft = 0.3048 m
1 ft = 30.40 cm
1 ft = 304.0 mm
1 m = 3.28 ft
1 km = 0.621 ft
Weight
1 lb = 0.453 kg
1 kg = 2.207 lb
Temperature
Fahrenheit = [°C] × 9/5 + 32
Celsius = ([°F] - 32) × 5/9
Celsius = [°K] - 273.15
Kelvin = [°C] + 273.15
Einstein
E = MC2
Heisenberg Uncertainty Principle
Δ x Δ p ≥ ħ / 2
Logic
All Swans are White
∀ x { Swan(x) ⇒ White(x) }
∃ x { Swan(x) ∧ ¬ White(x) }
No Swans are Black
∀ x { Swan(x) ⇒ ¬ Black(x) }
∃ x { Swan(x) ∧ Black(x) }
∃ x { Swan(x) ∧ White(x) }
∃ x { Swan(x) ∧ ¬ White(x) }
Water
|
Kelvin |
Celsius |
Fahrenheit |
| Absolute zero (precisely, by definition) |
0 K |
-273.15 °C |
-459.67 °F |
| Melting point of ice |
273.15 K |
0 °C |
32 °F |
| Water's triple point |
273.16 K |
0.01 °C |
32.018 °F |
| Water's boiling point at 1 atm |
373.1339 K |
99.9839 °C |
211.9710 °F |