physics

John A. Carroll

John A. Carroll 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 John A. Carroll rather than just read about it. In short: John Albert Carroll (July 30, 1901 – August 31, 1983) was a 20th-century American attorney and politician who served as a Democratic U.S. representative and U.S. senator from Colorado. He also served as a special assistant to President Harry Truman.

Key takeaways

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

Reference excerpt

John Albert Carroll (July 30, 1901 – August 31, 1983) was a 20th-century American attorney and politician who served as a Democratic U.S. representative and U.S. senator from Colorado. He also served as a special assistant to President Harry Truman.

Early life and education Born in Denver, he attended the public schools, and during the First World War served in the United States Army from 1918 to 1919. He graduated from Westminster Law School in Denver in 1929, and was admitted to the bar the same year and commenced practice in Denver.

Legal career In 1933 and 1934 he was assistant United States attorney, and was district attorney of Denver from 1937 to 1941. He was regional attorney for the Office of Price Administration in 1942 and 1943, and served in the Second World War as a commissioned officer in the U.S. Army from 1943 to 1945, after which he resumed the practice of law.

Political career

Congress In 1946 and 1948 Carroll was elected as a Democratic representative to the Eightieth and Eighty-first Congresses (January 3, 1947 to January 3, 1951). Carroll returned the Denver district to Democrats after a one term Republican interim, winning in a Republican year nationally. He looked to be a comer; columnist Tris Coffin called him "the great white hope of the liberal labor folks. The leadership put him on the Ways and Means Committee in his second term.

Senate campaigns Rather than run for re-election to the House in 1950, he was an unsuccessful candidate for election as a Democrat to the United States Senate. He ran for the Senate again in 1954 but was again defeated. He was a special assistant to President Harry Truman from 1951 to 1952.

Tenure in the Senate He was elected as a Democrat to the United States Senate in 1956, after defeating former United States Secretary of Agriculture Charles F. Brannan in the Democratic primary and former Republican Governor Daniel I.J. Thornton in the general election by a margin of less than one-half of one percent. He served in the Senate from January 3, 1957 to January 3, 1963. He was an unsuccessful candidate for reelection in 1962, having been defeated by Republican Peter H. Dominick.

Retirement and death He was a resident of Denver until his death. Interment was at Fort Logan National Cemetery, Denver.

Electoral history

References

External links FBI records on John A. Carroll United States Congress. "John A. Carroll (id: C000189)". Biographical Directory of the United States Congress.

Illustrations

Worked examples

Example 1 — a first encounter with John A. Carroll

Start with the simplest possible case. Write down what John A. Carroll 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 John A. Carroll 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 John A. Carroll 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 John A. Carroll

In research: John A. Carroll 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 John A. Carroll 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: John A. Carroll is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1901 births, 1983 deaths, 20th-century American lawyers, so understanding it makes those chapters shorter.
In everyday life: Look for John A. Carroll 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 John A. Carroll in 20 minutes

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

Frequently asked questions

What is John A. Carroll in simple terms?

Why does John A. Carroll 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 John A. Carroll?

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 John A. Carroll.