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Nicks glasses were found in the car. and investigators wanted to know if nick had been wearing them when the crash occurred. so they created a styrofoam facsimile of nicks head. >> i weighted the styrofoam head so that it was approximately the same weight as nicks head would have been in that same situation. >> they put an identical pair of glasses on the model to simulate the force of impact. it was attached to a pendulum. >> based on a potential energy formula, mass times gravity times height,...

Nicks glasses were found in the car. and investigators wanted to know if nick had been wearing them when the crash occurred. so they created a styrofoam facsimile of nicks head. >> i weighted the styrofoam head so that it was approximately the same weight as nicks head would have been in that same situation. >> they put an identical pair of glasses on the model to simulate the force of impact. it was attached to a pendulum. >> based on a potential energy formula, mass times gravity times height,...

>> they put an identical pair of glasses on the model to simulate the force of impact. it was attached to a pendulum. >> based on a potential energy formula, mass times gravity times height, i lifted the head that given height, allowed it to swing down and it collided with the steering wheel. >> this was a virtual re-creation of what would happen if nicks head had hit the steering wheel when the car crashed into the river at 15 miles per hour. there was far less damage to the test glasses than t...

Miles per hour. nicks glasses were found in the car. and investigators wanted to know if nick had been wearing them when the crash occurred. so they created a styrofoam facsimile of nicks head. >> i weighted the styrofoam head so that it was approximately the same weight as nicks head would have been in that same situation. >> they put an identical pair of glasses on the model to simulate the force of impact. it was attached to a pendulum. >> based on a potential energy formula, mass times gravi...

Water, it was moving at only 15 miles per hour. nicks glasses were found in the car. and investigators wanted to know if nick had been wearing them when the crash occurred. so they created a styrofoam facsimile of nicks head. >> i weighted the styrofoam head so that it was approximately the same weight as nicks head would have been in that same situation. >> they put an identical pair of glasses on the model to simulate the force of impact. it was attached to a pendulum. >> based on a potential ...

What we already new but what exactly do they look at here? >> first of all they looked at women over 50 and traced them for 30 years. this is a harvard study, it was done extremely well, if you its an observational study. what they found was that women that were thin to begin with, that have a body mass index, we call it a body mass index, meaning your weight for a given height, the taller you are, the more weight we let you have, thats body mass index, the women under 25, body mass index, thats...

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