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What Role Does Density Play In Flying Hot Air Balloons?

January 24, 2024 by David Evans

What Role Does Density Play In Flying Hot Air Balloons? Hot air balloons rise into the air because the density of the air (warmer air) inside the balloon is less dense than the air outside the balloon (cooler air). The balloon and the basket displaces a fluid that is heavier than the balloon and the

How Fast Does Compressed Air Travel?

January 24, 2024 by Rebecca Patel

How Fast Does Compressed Air Travel? There exist wind tunnels that accelerate compressed air to Mach 20, or 20 times the speed of sound, for example. Wow, that’s pretty fast. Can compressed air hurt you? People don’t always realise that compressed air can cause severe injury or worse, even when there is no direct contact