1. Suggest a reason why water will bead on a freshly waxed vehicle ?! 2 . When water is in a glass tube , the meniscus is concave since

Need help with these please, I am having a tough time understanding

1. Suggest a reason why water will "bead" on a freshly waxed vehicle ?!2 . When water is in a glass tube , the meniscus is concave since water has strong adhesiveforces to the glass ( adhesive forces are the intermolecular forces between water and the SiOzmolecules in glass ) , and will " creep " up the walls of the tube . Within a glass tube , wouldyou expect the meniscus for Age, to be convex or concave ? Explain .3 . When in an accident , the air bag in a vehicle inflates within about 30 ms . The gas whichinflates the air bag does not come from a compressed gas cylinder , but rather it is the productof a chemical reaction . An electrical charge detonates an igniter compound , which in turninitiates the decomposition of sodium azide ( NaN 3 ) .2 NaN 3 ( s) – 2 Na ( s ) + 3 N 2 ( 8)Typical steering column air bags are about 70 . I in size . Estimate the mass of NaNg neededto inflate such an air bag assuming the conditions of SIP .

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