General Knowledge · 2
What is the speed of sound in air at room temperature?
Answer
343 meters per second
The speed of sound in air at room temperature (approximately 20°C) is about 343 meters per second (1,235 km/hour or 767 mph). Sound travels slower in cold air and faster in warm air because molecular motion increases with temperature. The speed of sound depends on the medium—it travels faster in water and even faster in solids like steel.
💡 Did you know?
Sound travels much slower than light (1 million times slower), which is why we see lightning before hearing thunder—even from nearby lightning, there's a visible delay.
Other options people guess
- 200 meters per second
- 500 meters per second
- 600 meters per second
Topics
- physics
- science
- sound
Know your general knowledge trivia?
Play a free General Knowledge quiz and see how many you get right — no signup needed to start.
More General Knowledge facts
General Knowledge
What is the freezing point of water in Celsius?
Water's freezing point can be lowered by adding salts (salt water freezes at -2°C) through a process called freezing point depression, which is why salt is spread on icy roads.
General Knowledge
What is the chemical symbol for iron?
Iron's symbol 'Fe' comes from Latin 'ferrum'; iron is essential for oxygen transport in blood and is so important that iron deficiency causes anemia affecting billions.
General Knowledge
How many hours does it take light from the Sun to reach Earth?
The Sun you see right now is how it looked 8 minutes and 20 seconds ago; if the Sun suddenly vanished, we wouldn't know until 8 minutes later.
General Knowledge
How many hours are in a week?
168 hours equals one week; nutritionists often say you can't 'out-exercise' a bad diet in one week because you only have 168 hours to work with.
General Knowledge
What is the most populous country in the world?
India surpassed China in 2023 to become the most populous country; India will likely reach 1.7 billion people by 2050, while China's population is declining.
General Knowledge
How many sides does a pentagon have?
The Pentagon building in Washington D.C. is named for its distinctive five-sided shape; regular pentagons appear in nature through starfish and certain flowers.