physics

Martha Hennessy

Martha Hennessy 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 Martha Hennessy rather than just read about it. In short: Martha Hennessy (born July 11, 1955) is an American Catholic peace activist and member of the Catholic Worker Movement co-founded by her grandmother, Dorothy Day. Life and work Hennessy grew up Weathersfield, Vermont.

Key takeaways

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

Reference excerpt

Martha Hennessy (born July 11, 1955) is an American Catholic peace activist and member of the Catholic Worker Movement co-founded by her grandmother, Dorothy Day.

Life and work Hennessy grew up Weathersfield, Vermont. She is the seventh child of David Hennessy and Tamar Day Hennessy, the only child of Dorothy Day. Her sister is the author Kate Hennessy. She worked for 30 years as an occupational therapist, including time at the US Department of Veterans Affairs (VA) Medical Center, White River Junction Healthcare System in White River Junction. Hennessy is active in the Catholic Worker Movement. In 1979, Hennessy was arrested with many other demonstrators while attempting to occupy the Seabrook Station Nuclear Power Plant under construction in Seabrook, New Hampshire. Since then, she has been arrested while demonstrating against the prison at Guantanamo Bay, the United States government's use of drones in war, and the use of starvation as a weapon of war in Yemen. In 2020 Hennessy was interviewed about her life, anti-war activism, and grandmother, Dorothy Day, who co-founded the Catholic Worker Movement with Peter Maurin in 1933.

Kings Bay Plowshares On April 4, 2018, Hennessy took part in the Kings Bay Plowshares action, breaking into Kings Bay Naval Submarine Base in Georgia to protest its stockpile of nuclear weapons. She was arrested and later placed under house arrest in late May 2018 with an electronic monitoring bracelet strapped to her left ankle. On November 13, 2020, she was sentenced to 10 months in prison. As an extension of the Plowshares witness she blurbed a book about Plowshares, ARISE AND WITNESS: Poems by Anne Montgomery, RSCJ, About Faith, Prison, War Zones and Nonviolent Resistance, published in 2024.

Personal life Hennessy is married to Steven Melanson, a carpenter and photographer. They have been married for 40 years. She is a grandmother of eight. She lives on her family farm in Vermont and at Maryhouse Catholic Worker in New York City.

References

Illustrations

Worked examples

Example 1 — a first encounter with Martha Hennessy

Start with the simplest possible case. Write down what Martha Hennessy 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 Martha Hennessy 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 Martha Hennessy 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 Martha Hennessy

In research: Martha Hennessy 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 Martha Hennessy 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: Martha Hennessy is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1955 births, American Christian pacifists, Anti–nuclear weapons movement, so understanding it makes those chapters shorter.
In everyday life: Look for Martha Hennessy 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 “Martha Hennessy” →

Affiliate

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

How to study Martha Hennessy in 20 minutes

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

Frequently asked questions

What is Martha Hennessy in simple terms?

Martha Hennessy (born July 11, 1955) is an American Catholic peace activist and member of the Catholic Worker Movement co-founded by her grandmother, Dorothy Day. Life and work Hennessy grew up Weathersfield, Vermont.

Why does Martha Hennessy 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 Martha Hennessy?

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 Martha Hennessy.