astronomy

Johan Wilcke

Johan Wilcke is a astronomy 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 Johan Wilcke rather than just read about it. In short: Johan Carl Wilcke (6 September 1732 – 18 April 1796) was a Swedish physicist. Biography Wilcke was born in Wismar, son of a clergyman who in 1739 was appointed second pastor of the German Church in Stockholm.

Key takeaways

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

Reference excerpt

Johan Carl Wilcke (6 September 1732 – 18 April 1796) was a Swedish physicist.

Biography Wilcke was born in Wismar, son of a clergyman who in 1739 was appointed second pastor of the German Church in Stockholm. He went to the German school in Stockholm and enrolled at the University of Uppsala in 1749. He spent the years from 1751 travelling abroad and received the magister degree from the University of Rostock in 1757, after having published the dissertation De electricitatibus contrariis. In 1759 he became the first "Thamian lecturer" of experimental physics at the Royal Swedish Academy of Sciences, a position created through a donation from the wealthy merchant Sebastian Tham, and a member of the academy. He became a titular professor in 1770, and permanent secretary of the Academy of Sciences in 1784. He died in Stockholm in 1796. His two areas of significant research were electricity and caloric theory. In 1762 he invented an electrostatic generator that was a first version of the electrophorus, a device named and popularized in 1775 by Alessandro Volta. In 1772 he calculated the latent heat of ice. In 1781, he coined the concept and term of "specific heat" (Specifica-varme), in analogy with the term "specific gravity" (Specifica-tyngd). In 1789 he was elected a Fellow of the Royal Society in London.

Notes

References Svenskt biografiskt handlexikon, vol 2, p. 732 [1] (Swedish) Encyclopedia.com: Wilcke, Johan Carl

External links Johan Carl Wilcke in Rostock Matrikelportal

Illustrations

Worked examples

Example 1 — a first encounter with Johan Wilcke

Start with the simplest possible case. Write down what Johan Wilcke claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Johan Wilcke 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 Johan Wilcke 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 Johan Wilcke

In research: Johan Wilcke appears in astronomy 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 Johan Wilcke 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: Johan Wilcke is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1732 births, 1796 deaths, Fellows of the Royal Society, so understanding it makes those chapters shorter.
In everyday life: Look for Johan Wilcke 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 Johan Wilcke in 20 minutes

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

Frequently asked questions

What is Johan Wilcke in simple terms?

Johan Carl Wilcke (6 September 1732 – 18 April 1796) was a Swedish physicist. Biography Wilcke was born in Wismar, son of a clergyman who in 1739 was appointed second pastor of the German Church in Stockholm.

Why does Johan Wilcke matter?

Because it connects several astronomy 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 Johan Wilcke?

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 Johan Wilcke.