Special Numbers in The Metric System
Here are some special and interesting numbers in the Metric System:
| Quantity | Approximate Value | Notes |
|---|---|---|
| Speed of light (in vacuum) | 300 000 000 m/s | 3 x 108 in Scientific Notation More accurately 299 792 458 m/s |
| Speed of sound (in air) | 340 m/s | Varies with temperature and pressure |
| Earth's gravity | 9.8 m/s2 | Varies by location |
| Distance from Earth to Sun | 150 000 000 km | Varies over the year |
| Distance from Earth to Moon | 384 000 km | Varies |
| Circumference of Earth |
40 000 km | |
| Height of Mount Everest | 8849 m | |
| Height of geostationary satellite |
35 800 km | |
| Freezing point of water | 0°C | Varies with pressure |
| Human body temperature | 37°C | Varies by person, site and health |
| Boiling point of water | 100°C | Varies with pressure |
| Atmospheric pressure | 100 kPa | Varies with weather and height |
| Density of water | 1 g/cm3 (= 1 kg per liter) |
Varies with temperature and pressure |
| Density of rock | 3 g/cm3 | Varies a lot based on type of rock |
| Density of gold | 19.3 g/cm3 |