air pressure....PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!?

Question

a) Why does air pressure increase when u pump up a bike tyre??????


B)how would the air pressure change as the temperature got warmer


C)Biefly explain your answer to part B

D) Explain why tyres that contain air avbsorbing bumps are better than solid rubber tyres....


???????


thank u (if u answered).......

p..s.....u dont have 2 answer all of them

Thank u once again....

Answer 1

PV = nRT

Same volume after pumping, same temperature after cooling down, but more moles and therefore high pressure.

More simply; more gas, more molecules bouncing off the walls, more pressure.

Higher temperature, faster moving molecules, more impact on each bounce (and, if you think about it, more bounces), more pressure. (Or, if you like the equation, increasing T means you increase P)

Just feel a pneumatic tyre and a solid tyre. The solid tyre cannot flex round obstacles as easily.

Answer 2

B.As temp is warmer,air pressure increases.