How do mermaids breath underwater?

To be like dolphin lungs, mermaids lungs are more elasticy (stretchable) than the average humans, and have the capability to use almost all the oxygen that they store. Gills: Basically, it’s like breathing on land but you’re underwater!

Can you talk underwater?

Even though sound travels well in water, our vocal cords are not designed to generate underwater sound. Special underwater communication systems have been developed to allow divers to talk to each other underwater.

Can people hear you if you scream underwater?

While yelling underwater is still audible, it’s not nearly as effective as it is in air. But that’s only when people yell underwater. Cetaceans make their living yelling underwater and do it very well, but only rarely do they release air into the ocean to do so.

Can you scream in space?

Sound is a mechanical wave, which means that it needs substance to travel through, such as air or water. In space, there is no air, so sound has nothing to travel through. If someone were to scream in space, the sound wouldn’t even leave their mouths.

Has anyone lost in space?

A total of 18 people have lost their lives either while in space or in preparation for a space mission, in four separate incidents. In 2003 a further seven astronauts died when the shuttle Columbia broke up on re-entry into Earth’s atmosphere. …

Is there smoke in space?

Smoke from your cigarette rises because the particles that make up the smoke are driven upwards by the rising of the hot air from the flame. In space hot air doesn’t rise up because there is no ‘up’. Smoke rises because it’s hotter, therefore lighter, than surrounding air. It won’t rise in a weightless environment.

Why is fire so bad in space?

In low gravity situations, there is no buoyancy from flames. Convection, the movement of air, is an important way that heat is transferred to other spaces. Without air, fires don’t spread as rapidly. The flame’s unusual shape creates different amounts of soot, smoke or harmful gases.

Can things explode in space?

The vacuum of space will pull the air from your body. So if there’s air left in your lungs, they will rupture. Oxygen in the rest of your body will also expand. You’ll balloon up to twice your normal size, but you won’t explode.

Can you vacuum up smoke?

So long as the vacuum has a HEPA filter/bag, Yes.