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Tutor profile: Paulina V.

Paulina V.
Tutor for five years. Physicist.

Questions

Subject: Physics (Newtonian Mechanics)

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Question:

An object is subject to two forces that do not point in opposite directions. Is it possible to choose their magnitudes so that the object is in equilibrium?

Paulina V.
Answer:

Essentially, no. If there are only two forces acting on a system, and they are not in opposite directions, then the sum for all directions cannot be zero. Note that an object against a surface will be subject to the normal force, and that must be one of the two involved.

Subject: Calculus

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Question:

What kind of information we can obtain from the derivatives of a function?

Paulina V.
Answer:

The first and second derivatives determine the intervals of increase and decrease of a function, the maximum and minimum points, the interval(s) of concavity and points of inflections.

Subject: Physics

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Question:

¿When can you use the Gibbs-Duhem relation?

Paulina V.
Answer:

We can use the Gibbs-Duhem relation to verify thermodynamic consistency in our system description.

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