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Tutor profile: Emily C.

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Emily C.
Recent Masters Graduate with Experience as Teaching Assistant
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Questions

Subject: Physics (Heat Transfer)

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Question:

Two of the main forms of heat transfer are conductance and convection, explain the similarities and differences between the two and how they are present in heat transfer through a multi-paned window.

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Emily C.
Answer:

Convection and conductance are both methods of transferring heat, however conductance needs direct contact with the other object while convection transfers heat through a gas/fluid, but most often air. For example, in window there are usually several pane. Heat is transferred through each glass pane through conductance. When the heat reaches the gas between window pains, heat is then transferred through conductance.

Subject: Basic Chemistry

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Question:

Explain ionic bonding and what is happening when a sodium ion bonds to a chloride ion.

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Emily C.
Answer:

Ionic bonding is when two or more atoms share electrons in their valence shells to create a more stable compound. Valence shells (other than the first shell) are most stable when they have eight valence electrons. Since sodium has one valence electron in its outer shell and chloride has seven, sodium shares its "extra" electron to create a more stable full valence shell on the sodium atom. This forms an ionic bond between the two.

Subject: Calculus

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Question:

What is effectively happening to an equation when you take the integral? What is the difference between a definite integral (bound) and unbound integral?

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Emily C.
Answer:

When you take the integral of an equation you are finding the area that exists under the curve. For example, the equation y=x is a straight line equation and taking the integral of y=x finds the area between the line and the x-axis. Having the equation bound gives two x-values between which you are evaluating the area. However, an unbound equation gives you a new area equation which can be applied to any bounds to find the area in the future.

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