- Why is space silent?
- Is there life on Mars?
- Can astronauts hear each other in space?
- Can we hear in space?
- How quiet is space?
- Will a body decay in space?
- Can you breathe in space?
- How long can a human live in space?
- What is the quietest thing in the world?
- Is there really no sound in space?
- Does space have a smell?
- Can a falling bullet kill you?
- How cold is space?
- Is the universe silent?
- Can a gun fire in space?
- Why sound does not travel in space?
- What is the loudest sound ever recorded on Earth?
- Do planets make sounds in space?
- Are there any human bodies in space?
- Will a gun fire underwater?
- Can there be infinite dimensions?
Why is space silent?
In space, no one can hear you scream.
This is because there is no air in space – it is a vacuum.
Sound waves cannot travel through a vacuum.
‘Outer space’ begins about 100 km above the Earth, where the shell of air around our planet disappears..
Is there life on Mars?
To date, no proof has been found of past or present life on Mars. Cumulative evidence shows that during the ancient Noachian time period, the surface environment of Mars had liquid water and may have been habitable for microorganisms.
Can astronauts hear each other in space?
When astronauts are out in space, they can whistle, talk, or even yell inside their own spacesuit, but the other astronauts would not hear the noise. In fact, the middle of space is very quiet. Sound travels in waves, and it moves at different speeds through air or water or other materials.
Can we hear in space?
It’s a fact well-known enough to be the tagline to the 1979 sci-fi horror blockbuster Alien: “In space, no one can hear you scream.” Or to put it another way, sound can’t be carried in the empty vacuum of space – there just aren’t any molecules for the audio vibrations to move through.
How quiet is space?
You may have been told definitively that space is silent, maybe by your teacher or through the marketing of the movie Alien—’In space, no one can hear you scream. ‘ The common explanation for this is that space is a vacuum and so there’s no medium for sound to travel through. But that isn’t exactly right.
Will a body decay in space?
If you do die in space, your body will not decompose in the normal way, since there is no oxygen. If you were near a source of heat, your body would mummify; if you were not, it would freeze. If your body was sealed in a space suit, it would decompose, but only for as long as the oxygen lasted.
Can you breathe in space?
Whatever you do, don’t hold your breath! The vacuum of space will pull the air from your body. So if there’s air left in your lungs, they will rupture. … Without air in your lungs, blood will stop sending oxygen to your brain.
How long can a human live in space?
437 daysHow long can humans live in space? We don’t know the answer to that. But every crew that resides on the International Space Station provides us information that we use to adjust our protocols and extends that period of time. The longest contiguous amount of time a human has spent in space is 437 days.
What is the quietest thing in the world?
The quietest place on earth, an anechoic chamber at Orfield Laboratories in Minnesota, is so quiet that the longest anybody has been able to bear it is 45 minutes. Inside the room it’s silent. So silent that the background noise measured is actually negative decibels, -9.4 dBA.
Is there really no sound in space?
Space Environment So, in order for sound to travel, there has to be something with molecules for it to travel through. On Earth, sound travels to your ears by vibrating air molecules. In deep space, the large empty areas between stars and planets, there are no molecules to vibrate. There is no sound there.
Does space have a smell?
According to astronauts, they all smell like space. While each astronaut smells something a bit different, they all agree ‘space stinks’. Obviously, space is a vacuum, so no one has really ‘smelled’ it before in the traditional sense of the word. … But we can smell it indirectly.
Can a falling bullet kill you?
Falling-bullet injuries Bullets fired into the air usually fall back with terminal velocities much lower than their muzzle velocity when they leave the barrel of a firearm. Nevertheless, people can be injured, sometimes fatally, when bullets discharged into the air fall back down to the ground.
How cold is space?
Hot things move quickly, cold things very slowly. If atoms come to a complete stop, they are at absolute zero. Space is just above that, at an average temperature of 2.7 Kelvin (about minus 455 degrees Fahrenheit).
Is the universe silent?
With no space to expand into, there could be no medium around it into which sound waves could possibly propagate. But, in cosmic terms, the Universe was not silent for long — 380,000 years later (a mere 0.0003 per cent of its present age), it was filled with sound.
Can a gun fire in space?
Fires can’t burn in the oxygen-free vacuum of space, but guns can shoot. Modern ammunition contains its own oxidizer, a chemical that will trigger the explosion of gunpowder, and thus the firing of a bullet, wherever you are in the universe. No atmospheric oxygen required.
Why sound does not travel in space?
Sound does not travel at all in space. The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound. … Radio is a form of electromagnetic radiation just like light and can therefore travel through the vacuum of space just fine.
What is the loudest sound ever recorded on Earth?
4. The Krakatoa volcanic eruption: Not only did it cause serious damage to the island, the eruption of Krakatoa in 1883 created the loudest sound ever reported at 180 dB. It was so loud it was heard 3,000 miles (5,000 km) away.
Do planets make sounds in space?
NASA Space Sounds: what happens when spacecraft are used to record radio emissions from planetary environments, which are then converted to sound waves. Here’s something you don’t hear everyday. … More specifically, it’s a translation of electromagnetic vibrations from various planetary environments into sound.
Are there any human bodies in space?
The resulting drop in pressure also exposed the crew to the vacuum of space — the only human beings to ever experience such a fate. They died within seconds of the rupture, which occurred at 168 kilometers (104 miles), making them the only human beings to die in space.
Will a gun fire underwater?
Design. Because standard bullet ammunition does not work well underwater, a common feature of underwater firearms is that they fire flechettes instead of standard bullets. The barrels of underwater pistols are typically not rifled.
Can there be infinite dimensions?
The 11 dimensions are part of a class of string theory called M Theory. … One possible, a simple view it is that every independent physical quantity will add at least one dimension. So theoretically, there might be a very high or even infinitely many dimensions in the Universe.