chemistry

Sarah E. Petrie

Sarah E. Petrie is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sarah E. Petrie rather than just read about it. In short: Sarah Elaine B. Petrie is a Canadian and American physical chemist who worked for the research laboratories of Eastman Kodak and became known for her research on the thermal properties of glasses, polymers, and liquid crystals.

Key takeaways

Sarah E. Petrie belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sarah E. Petrie to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sarah E. Petrie from memory before moving on to harder problems.

Reference excerpt

Sarah Elaine B. Petrie is a Canadian and American physical chemist who worked for the research laboratories of Eastman Kodak and became known for her research on the thermal properties of glasses, polymers, and liquid crystals. Petrie earned a Ph.D. in chemistry in 1957 from the University of Toronto, with the dissertation Dielectric behaviour of vapours adsorbed on porous and non-porous adsorbents, supervised by Robert L. McIntosh. By the same year she was working for the Kodak Research Laboratories. In 1977 she was appointed to a panel on polymers in the National Bureau of Standards and as an advisor to the office of chemistry and chemical technology of the National Research Council. She also served as a councilor to the American Chemical Society Division of Polymer Chemistry from 1979 to 1981. By 1994, when she served on the Committee on Polymer Science and Engineering of the National Research Council, she was listed as retired from Kodak. In 1976, Petrie was named a Fellow of the American Physical Society (APS), after a nomination from the APS Division of Polymer Physics.

References

Worked examples

Example 1 — a first encounter with Sarah E. Petrie

Start with the simplest possible case. Write down what Sarah E. Petrie claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sarah E. Petrie before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sarah E. Petrie ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sarah E. Petrie

In research: Sarah E. Petrie appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Sarah E. Petrie in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Sarah E. Petrie is common in secondary-school and first-year university syllabi. It links to neighbouring topics American chemists, American women chemists, Canadian chemists, so understanding it makes those chapters shorter.
In everyday life: Look for Sarah E. Petrie outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sarah E. Petrie in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sarah E. Petrie means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Sarah E. Petrie out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sarah E. Petrie in simple terms?

Why does Sarah E. Petrie matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sarah E. Petrie?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sarah E. Petrie.