please give both answer correct will rate u A cylinder containing some gas A is

Question

please give both answer correct will rate u

A cylinder containing some gas A is fitted with an idealized piston. Gas A is at 1.2 atm, 10.0 L and at 432K. What external pressure is required to compress this gas irreversibly to a final volume of 3.20L?

0.12 atm

0.33 atm

0.45 atm

0.52 atm

3)A bug on the rim of a 10.0 in. diameter disk if the disk moves from rest to an angular speed of 75rev/min in 4.0 s? One second after the bug starts from rest, what is the total acceleration?

0.2562 m/s^2

0.3453 m/s^2

0.5417 m/s^2

0.5876 m/s^2

Explanation / Answer

Question 1)using the ideal gas equation for isothermal compression which is ( P*V = n*R*T)

The equation to be used is , P1 *V1 = P2*V2

now,

P2 = P1*V1/V2

substituting the values P1 = 1.2 atm, V1 = 10 L, V2 = 3.2 L

P2 = 1.2*10/3.2 = 3.75 atm

External pressure = 3.75 atm , but this is not in the option

The method used is correct

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