science

Sink

Sink is a science 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 Sink rather than just read about it. In short: A sink (also known as basin or washbin in the UK) is a bowl-shaped plumbing fixture for washing hands, dishwashing, and other purposes. Sinks have a tap (faucet) that supplies hot and cold water and may include a spray feature to be used for faster rinsing.

Key takeaways

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

Reference excerpt

A sink (also known as basin or washbin in the UK) is a bowl-shaped plumbing fixture for washing hands, dishwashing, and other purposes. Sinks have a tap (faucet) that supplies hot and cold water and may include a spray feature to be used for faster rinsing. They also include a drain to remove used water; this drain may itself include a strainer and/or shut-off device and an overflow-prevention device. Sinks may also have an integrated soap dispenser. Many sinks, especially in kitchens, are installed adjacent to or inside a counter.

History The washstand was a bathroom sink made in the United States in the late 18th century. The washstands were small tables on which were placed a pitcher and a deep bowl, following the English tradition. Sometimes the table had a hole where the large bowl rested, which led to the making of dry sinks. From about 1820 to 1900, the dry sink evolved by the addition of a wooden cabinet with a trough built on the top, lined with zinc or lead.

Materials Stainless steel is most commonly used in kitchens and commercial applications because it represents a good trade-off between cost, usability, durability, and ease of cleaning. Most stainless steel sinks are made by drawing a sheet of stainless steel over a die. Some very deep sinks are fabricated by welding. Stainless steel sinks will not be damaged by hot or cold objects and resist damage from impacts. Stainless steel sinks are widely celebrated for their durability, sleek appearance, and resistance to rust and corrosion. One disadvantage of stainless steel is that, being made of thin metal, they tend to be noisier than most other sink materials, although some manufacturers may apply a coat of vibration-damping material to the underside of the sink. Other materials used for sinks include soapstone, fire clay, granite, cast iron, quartz, porcelain, and copper.

Styles

Butler's sink

A butler's sink is a rectangular ceramic sink with a rounded rim which is set into a work surface. There are generally two kinds of butler's sinks: the London sink and the Belfast sink. In 2006, both types of sinks usually were 62 centimetres (24 in) across and 46 centimetres (18 in) front-to-back, with a depth of 22.5 centimetres (8.9 in). London sinks were originally shallower than Belfast sinks. One plumbing guide in 1921 suggested that the Belfast sink was 38 centimetres (15 in) deep. The primary difference both in the past and today between a Belfast and London sink is that the Belfast sink is fitted with an overflow weir which prevented water from spilling over the sink's edge by draining it away and down into the wastewater plumbing.

Vessel sink

A vessel sink is a free-standing sink, generally finished and decorated on all sides, that sits directly on the surface of the furniture on which it is mounted. These sinks have become increasingly popular with bathroom designers because of the large range of materials, styles, and finishes that can be used.

See also Dipper well Domestic water system Floor plan Garbage disposal Lavabo Proverbial kitchen sink Trap (plumbing)

References

Bibliography Blower, G. J. (2006). Plumbing: mechanical services (5th ed.). Harlow: Prentice Hall. ISBN 0131976214. Fletcher, Banister Flight, Sir. Architectural Hygiene. London: Sir I. Pitman & Sons, 1921.

External links Media related to Sinks at Wikimedia Commons The dictionary definition of sink at Wiktionary

Illustrations

Sink: Bathroom stainless steel vessel sink standing on a wood surface — Bathroom stainless steel vessel sink standing on a wood surface

Worked examples

Example 1 — a first encounter with Sink

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

In research: Sink appears in science 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 Sink 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: Sink is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bathrooms, Kitchen, Plumbing, so understanding it makes those chapters shorter.
In everyday life: Look for Sink 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 Sink in 20 minutes

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

Frequently asked questions

What is Sink in simple terms?

Why does Sink matter?

Because it connects several science 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 Sink?

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 Sink.