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Tutor profile: Alejandra T.

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Alejandra T.
Chemical Engineering Student
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Questions

Subject: Physics (Thermodynamics)

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Question:

If matter and energy cannot be created nor destroyed, where does it all go?

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Alejandra T.
Answer:

It's a tough one to picture but think of this: when you boil water on the stove, it will begin to evaporate until it's all gone if you don't remove it from the heat source. The water has undergone a phase change that changes it's physical properties but is still currently existing in a different form in your kitchen. While matter cannot be created nor destroyed, it simply changes form. There are better explanation involving properties like volume, pressure, entropy, enthalpy and internal energy but that its the surface level explanation.

Subject: Physics (Heat Transfer)

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Question:

What is heat transfer and how does it work?

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Alejandra T.
Answer:

Heat transfer is the energy exchange created by a temperature difference in a medium. Heat flows from high temperatures to low temperatures until it achieves equilibrium meaning that the temperature difference becomes very close to zero. The three main forms of heat transfer are conduction, convection and radiation. Let me know if you'd like a few examples!

Subject: Physics (Fluid Mechanics)

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Question:

Why do we often see pressure differentials along a piping network system?

Inactive
Alejandra T.
Answer:

A piping network system constitutes of pipes or channels interconnected by fittings and bends. When designing a piping network, engineers have to take things into account like the material of the pipe, the fittings required and the placement of the fittings. Things like friction due to the flow of fluid coming in contact with the pipe walls can create turbulence and even fouling over time. These are only a few things that can affect the pressure along the channel.

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