Physics Numbers Worth Remembering
💡 Speed of Light
Light travels about 300,000 km per second — that's 300,000,000 meters every second! It's the fastest anything can go. Light from the Sun takes about 8 minutes to reach Earth.
🔊 Speed of Sound
Sound travels much slower than light — about 343 meters per second in air (around 1,235 km/h). That's why you sometimes see lightning before you hear the thunder!
🍎 Gravity on Earth
Things fall faster and faster the longer they drop — about 9.8 meters per second faster every second. That's why a dropped ball speeds up as it falls.
🧊 Water Freezing Point
Water turns to ice at 0°C (32°F). Below that, liquid water becomes solid.
♨️ Water Boiling Point
Water turns to steam at 100°C (212°F) at normal air pressure — that's a 100-degree gap between freezing and boiling on the Celsius scale!