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ANEK [815]
3 years ago
12

Compared with cool air, warm air is:________

Physics
1 answer:
photoshop1234 [79]3 years ago
3 0

Answer:

option (b)

Explanation:

The density of cool air is more so always falls downwards.

Compared to the cool air, the density of air is less and it tends to rise.

Thus, option (b) is correct.

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A force in the x direction acts on a particle moving also in the x direction, producing a potential energy U(x)=Ax4 where A=0.63
poizon [28]

Answer:

The magnitude of the force is 1.29*10^-3N in the positive x direction

Explanation:

In order to calculate the magnitude and direction of the force, you take into account that the force is the space derivative of the potential enrgy, as follow:

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F(x)=-\frac{d}{dx}[Ax^4]=-4Ax^3     (2)

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