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Question 1: Bicycle pump

In this problem, you will look at the pressure developed by the piston in a

bicycle pump

Air at atmospheric pressure (1.0 x 105 Pa) is compressed at constant

temperature in a bicycle pump so that its volume is reduced by a factor of

5.

What is the pressure of the air when compressed?


Sagot :

Answer: The pressure  of the air when compressed is [tex]5.0\times 10^5Pa[/tex]

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

[tex]P\propto \frac{1}{V}[/tex]     (At constant temperature and number of moles)

[tex]P_1V_1=P_2V_2[/tex]  

where,

[tex]P_1[/tex] = initial pressure of gas  = [tex]1.0\times 10^5Pa[/tex]

[tex]P_2[/tex] = final pressure of gas  =?

[tex]V_1[/tex] = initial volume of gas  = V

[tex]V_2[/tex] = final volume of gas  = [tex]\frac{V}{5}[/tex]

[tex]1.0\times 10^5\times V=P_2\times \frac{V}{5}[/tex]  

[tex]P_2=5.0\times 10^5Pa[/tex]

Therefore, the pressure  of the air when compressed is [tex]5.0\times 10^5Pa[/tex]