- #1
Da Apprentice
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For a project of mine I tested crashing model cars into walls with medical syringes attached filled with varying ratios of air to water. from the results of this it was found that the syringe filled entirely with water was actually the syringe that was most efficient (absorbed the most force). I figured this to be due to this syringe absorbing more kinetic energy becasue it lost the most weight (Ek = 1/2mv^2). But I was just thinking that the differnce in the mass of air and water isn't that much, is it? I figured the dfference would be only the mass of the two additional hydrogen ions, but this is only 2. so the relative atomic mass of oxygen is 16 and the atomic mass of H2O would be 18. the diffence between these two is really small, whereas in the tests the syringe involving air compressed 7 of a possible 12cm and in the test involving water the syringe compressed only 1 cm a relatively large differnce(for aproximately the same velocities)
Is this correct how diffence in the mass of the air and water was calculated or should this be done in another way? would anyone have anyother ideas why the syringe filled entirely with ar would've been the most successful?
Thanks of the help
Is this correct how diffence in the mass of the air and water was calculated or should this be done in another way? would anyone have anyother ideas why the syringe filled entirely with ar would've been the most successful?
Thanks of the help