physics

Noah Ernest Dorsey

Noah Ernest Dorsey is a physics 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 Noah Ernest Dorsey rather than just read about it. In short: Noah Ernest Dorsey (March 15, 1873 – July 6, 1959) was an American physicist, known for his contributions to measurement technology. Background Dorsey was born in Annapolis Junction, Maryland and studied at Johns Hopkins University where he obtained a B.A.

Key takeaways

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

Reference excerpt

Noah Ernest Dorsey (March 15, 1873 – July 6, 1959) was an American physicist, known for his contributions to measurement technology.

Background Dorsey was born in Annapolis Junction, Maryland and studied at Johns Hopkins University where he obtained a B.A. (1893) and a Ph.D. (1897). He worked at the same place a few years, was with U. S. Bureau of Soils and the Department of Agriculture as well, before he eventually joined National Bureau of Standards (1903) where he stayed until retirement in 1943. His research was on standards of radioactivity and x-ray measurements (1914–22), becoming the leader of the Radium Section (1921) and publishing a widely used book covering this emerging field, including specifications of his own bodily injuries from interactions with radium and radon. Dorsey died in Towson, Maryland on July 6, 1959 at the age of 86.

Selected works Dorsey, Noah Ernest (1921). Physics of Radioactivity: The Text of a Correspondence Course Prepared Especially for the Medical Profession. Williams & Wilkins. Dorsey, Noah Ernest (1948). The Freezing of Supercooled Water. American Philosophical Society. ISBN 978-0-87169-383-9. {{cite book}}: ISBN / Date incompatibility (help) Dorsey, Noah Ernest (1940). Properties of Ordinary Water-substance in All Its Phases: Water Vapor, Water, and All the Ices. American Chemical Society. ISBN 978-0-8412-0255-9. {{cite book}}: ISBN / Date incompatibility (help) Rosa, Edward Bennett; Dorsey, Noah Ernest; Miller, John Milton (1913). A Determination of the International Ampere in Absolute Measure. U.S. Department of Commerce and Labor, Bureau of Standards. Rosa, Edward Bennett; Dorsey, Noah Ernest (1907). A Comparison of the Various Methods of Determining the Ratio of the Electromagnetic to the Electrostatic Unit of Electricity. U.S. Department of Commerce and Labor, Bureau of Standards. Dorsey, Noah Ernest (1926). Measurement of Surface Tension. U.S. Government Printing Office. Dorsey, Noah Ernest (1926). Measurement of Surface Tension. U.S. Government Printing Office.

References

Illustrations

Worked examples

Example 1 — a first encounter with Noah Ernest Dorsey

Start with the simplest possible case. Write down what Noah Ernest Dorsey claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, 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 Noah Ernest Dorsey 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 Noah Ernest Dorsey 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 Noah Ernest Dorsey

In research: Noah Ernest Dorsey appears in physics 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 Noah Ernest Dorsey 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: Noah Ernest Dorsey is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1873 births, 1959 deaths, American physicist stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Noah Ernest Dorsey 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Noah Ernest Dorsey” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Noah Ernest Dorsey in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Noah Ernest Dorsey 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 Noah Ernest Dorsey out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Noah Ernest Dorsey in simple terms?

Noah Ernest Dorsey (March 15, 1873 – July 6, 1959) was an American physicist, known for his contributions to measurement technology. Background Dorsey was born in Annapolis Junction, Maryland and studied at Johns Hopkins University where he obtained a B.A.

Why does Noah Ernest Dorsey matter?

Because it connects several physics 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 Noah Ernest Dorsey?

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 Noah Ernest Dorsey.