styrofoam

A helmet is a shock absorber, the styrofoam is compressed during the collision.

Maybe a little styrofoam, maybe, little styrofoam.

When a helmet protects your head from a serious injury, the styrofoam inside will be compressed and stay that way.

As long as the styrofoam gets bent/compressed (but does not break), it takes a lot of energy from the fall.

If the shell shattered but the styrofoam didn't compress then no significant force dissipation happened.

My favorite is the Shanghai bridge made out of styrofoam and garbage [1], but there are other, less spectacular examples: [2].

This is where you purchase everything from hygiene supplies and chips to a Styrofoam cup.

It's sort of like a charged comb or other object repelling styrofoam particles.

When a helmet protects your head from a serious injury, the styrofoam inside will be compressed and stay that way Is this correct?

The former is easily spoofed (put your uranium pit in a styrofoam sphere in a truck full of grain, done), and the latter is hard to do at speed in a rugged environment.

The main absorbtion of energy is all in the styrofoam.

However, the thickness of the styrofoam has not been compressed.

So here is a short snippet: "If the styrofoam does not compress, it cannot reduce linear acceleration of the brain.

The "cap" is a long styrofoam tube with a plastic top that comes on and off with no resistance (if you upended the dewar, that cap would slide right out).

When it comes to tropical fruits it is the same: American bananas taste like Styrofoam, guavas are bland.

Styrofoam cooler is ok and dry ice will last 2-3 days like that.