2. Explain why hydrogen molecules at 20oC will be travelling on average faster than oxygen molecules at the same temperature. 3. In terms of particles explain (a) what happens when a solid melts (b) why energy is required for a solid to melt 4. Why does the air pressure in a bicycle tyre increase as more air is pumped in?
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becoz atomic weight of hydrogen is less than that of oxygen as the nuclear force of attrac tion is more in oxygen
when solid melts , it turns into liquid and the particles becomes loosely packed
because the particles of air is loosely packes and therefore composes more area in the tyre and increases pressure
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do you study in Shiv Nadar School Noida? If so which grd r u in? 7th?
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