On the moon, you need a space helmet so you can breathe oxegen. The moons atmostsphere is not like Earths, its thinner and they dont have the trees to make oxegen. Also the temperature is different and much colder so its heat control.
well it depends on if you have a buch of air tanks because you need air live and be in space
Astronauts communicated on the moon using radio transmissions through their space suits. They spoke into a microphone inside their helmets, which transmitted their voices to their fellow astronauts and mission control on Earth. The radio transmissions allowed for clear communication despite the challenges of being in space suits and helmets.
It shows what side a soldier is on from the design and even helmets today can deflect some kinds of bullets.
Helmets typically expire and need to be replaced every 5-10 years, depending on the manufacturer's recommendations and the helmet's usage and condition.
They wouldn't be able to talk with there helmets off
You can have one but you dont need it.
If required by your state for bikes.
Revolution helmets, manufactured by Riddell, are worn whilst playing American Football. These helmets are worn for safety purposes and protect against major head injuries.
There are many websites and companies that offer cycling helmets online for those that need one. Some of these websites that offer the helmets are Helmet City and Derailed.
There are plenty of helmets that provide MP3 support, but you'll need your own MP3 player.
Normally, to communicate in space, astronauts need radios. This is because sound (in this case, speech) requires a medium (such as air) to move through. In space, since there is no air, astronauts cannot talk to one another directly. However, in your case, the astronauts may converse because their helmets are touching - thus giving the sound waves a medium to move through - the helmets.
No the pictures are decals. Each player has two helmets per game so they can change them out if need be during the game.