Yes a helmet is a solid
A helmet prevents the head from taking a direct impact with some solid object.
Paint is liquid when you buy it, before you paint something with it, but when it dries it becomes a solid. Tea is liquid when brewed, although tea leaves are solid. A bird's nest, carrots, flowers, a helmet, or books are all solid objects.
When their helmets were touching, vibrations from their voices could travel through the helmets and into each other's ears, allowing them to hear each other. This is similar to how a stethoscope works by transmitting sound waves through a solid medium.
The best way to create your own personalized motorcycle helmet would be to do it yourself. Buy a solid colored helmet off craigslist or ebay for under $50. Next create a stencil and paint it unto your helmet.
By crashing and hitting your unprotected head.If you have an accident, crash or simply come off your bike and your head hits a solid object, unprotected by a crash helmet, it can cause severe head trauma and possibly death.
There's no solid answer to that. Some places do have mandatory helmet laws, others don't care. Some paths CAN be pedestrians only, while other paths are for dual use. You have to check your local regulations.
Yes, but it is not recommended. Helmet manufacturers recommend helmet replacement after any impact to the shell. A motorcycle helmet is designed to absorb the impact and damage that would otherwise be reserved for your skull, but it is not designed to survive the impact. Any impact from a drop on solid ground (concrete or hardwood floor) can cause microfractures to the shell that are naked to the human eye. A good rule of thumb is this: If the impact would have raised a bump on your unprotected head, get a new helmet.
Attic helmet, Corinthian helmet, Beotian helmet, Chalcidian helmet, Illyrian helmet, Boar's tusk helmet.
An aventail is the flap of adjustable part of the hood of chain mail, or, in a suit of solid armour, the movable front of the helmet, also known as the ventail.
An astronaut's helmet is called a space helmet or spacesuit helmet. It is a crucial component of an astronaut's spacesuit as it provides oxygen and protection in the vacuum of space.
The benefits of a Protec helmet are many. This helmet has been called the 'classic bike helmet'. It protects your head when you are participating in sports that can cause damage if a helmet is not used.
A climbing helmet offers better protection for outdoor activities compared to a bike helmet.