physics

Sognefjord Span

Sognefjord Span 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 Sognefjord Span rather than just read about it. In short: The Sognefjord Spans are the second, third, and fourth longest spans in the world situated east of Hermansverk/Leikanger in Vestland county, Norway. They are located in Sogndal Municipality, Vik Municipality, and Lærdal Municipality.

Key takeaways

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

Reference excerpt

The Sognefjord Spans are the second, third, and fourth longest spans in the world situated east of Hermansverk/Leikanger in Vestland county, Norway. They are located in Sogndal Municipality, Vik Municipality, and Lærdal Municipality. The spans are part of different powerlines which traverse the county. The Sognefjord Span crosses the deep fjord valley, so the pylons of these spans are not taller than ordinary pylons. In order to avoid any approaches or contacts between the conductors, each is mounted on a separate pylon at the end of the span, which is built as a steel framework tower.

Span 1 This span is part of the powerline between Hermansverk (61°10′49″N 6°51′53″E) and Vikøyri (61°04′50″N 6°35′13″E) and was built in the 1950s. It has a length of 4,850 metres (15,910 ft). This span was the longest span in the world until the inauguration of Ameralik Span. This span crosses the Sognefjord in a north-south direction. It has 4 conductors, one of which is for reserve.

Span 2 Span 2 is located about 400 metres (1,300 ft) southeast of the southern end of Span 1. This span is a powerline between the Sogndal (61°13′6″N 7°1′20″E) and Hove (61°04′12″N 6°35′43″E) substations. It crosses the Sognefjord in an east-west direction and it has a length of 4,520 metres (14,830 ft). Just like Span 1, it has 4 conductors, with one as a reserve.

Span 3 Approximately 9 kilometres (5.6 mi) east-southeast of the first two spans, Span 3 crosses the Sognefjord with a powerline from the Aurland1 power station (60°51′46″N 7°18′04″E) to the Langedøla power station (61°26′14″N 7°14′44″E). Span 3 has a length of 4,500 metres (14,800 ft) and it runs in a north-south direction. It has no reserve conductor and therefore consists of 3 conductors.

Worked examples

Example 1 — a first encounter with Sognefjord Span

Start with the simplest possible case. Write down what Sognefjord Span 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 Sognefjord Span 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 Sognefjord Span 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 Sognefjord Span

In research: Sognefjord Span 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 Sognefjord Span 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: Sognefjord Span is common in secondary-school and first-year university syllabi. It links to neighbouring topics Buildings and structures in Vestland, Energy in Norway, Powerline river crossings, so understanding it makes those chapters shorter.
In everyday life: Look for Sognefjord Span 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 Sognefjord Span in 20 minutes

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

Frequently asked questions

What is Sognefjord Span in simple terms?

Why does Sognefjord Span 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 Sognefjord Span?

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 Sognefjord Span.