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# Quick proportionality question

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1. P inversely proportional to V

if P changes by 2/3 does this mean V changes by 3/2?
2. (Original post by khanpatel321)
P inversely proportional to V

if P changes by 2/3 does this mean V changes by 3/2?
Nope

What's the question? As far as I know there's a constant which is either given or you have to calculate it using the information provided in the question.

Equation for this relation would be: P=k/v (k being the constant)
3. (Original post by TheCe)
Nope

What's the question? As far as I know there's a constant which is either given or you have to calculate it using the information provided in the question.

Equation for this relation would be: P=k/v (k being the constant)
Pressure is inversely proportional to volume.

Initial pressure = P0 Initial volume = V0

after a process the new pressure = 2/3(P0) What is the new volume?
4. If you're talking about multiplying when you say change then yes. If P is inversely proportional to V then (k is constant). If we replace V with 2V we get and so P has halved.

(Original post by khanpatel321)
Pressure is inversely proportional to volume.

Initial pressure = P0 Initial volume = V0

after a process the new pressure = 2/3(P0) What is the new volume?
5. (Original post by B_9710)
If you're talking about multiplying when you say change then yes. If P is inversely proportional to V then (k is constant). If we replace V with 2V we get and so P has halved.
P is inversely proportional to V

Initial pressure = P0 Initial volume = V0

After process 1

Pressure P1 = (2/3) * P0 So is V1 = (3/2)V0

Thank you
6. (Original post by khanpatel321)
P is inversely proportional to V

Initial pressure = P0 Initial volume = V0

After process 1

Pressure P1 = (2/3) * P0 So is V1 = (3/2)V0

Thank you
Yes.

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