Bathroom

Key takeaways

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

Reference excerpt

A bathroom is a room in which people wash their bodies or parts thereof. It can contain one or more of the following plumbing fixtures: a shower, a bathtub, a bidet, and a sink (also known as a wash basin in the United Kingdom). A toilet is also frequently included. There are also specific toilet rooms, only containing a toilet (often accompanied by a sink). In North American English, these tend to be called "bathrooms" or "half bathrooms", "washrooms", or "powder rooms" as a euphemism. In British English, they are referred to as "the loo", "water closets" or "WC", "toilets", and occasionally "cloakrooms" – and also "lavatories" when they are public. Historically, bathing was often a collective activity, which took place in public baths. In some countries, the shared social aspect of cleansing the body is still important, for example with sento in Japan and, throughout the Islamic world, the hammam (often known inaccurately in the West as a "Turkish" bath).

Variations and terminology

The term for the place used to clean the body varies around the English-speaking world, as does the design of the room itself. A full bathroom generally contains a bath or shower (or both), a toilet, and a sink (wash basin). An en suite bathroom or en suite shower room is attached to, and only accessible from, a bedroom. A family bathroom, in British estate agent terminology, is a full bathroom not attached to a bedroom, but with its door opening onto a corridor. A Jack and Jill bathroom (or connected bathroom) is situated between and usually shared by the occupants of two separate bedrooms. It may also have two wash basins. A wetroom is a waterproof room usually equipped with a shower; it is designed to eliminate moisture damage and is compatible with underfloor heating systems. In the U.S., there is a lack of a single definition. This commonly results in discrepancies between the advertised and actual number of baths in real estate listings. Bathrooms are generally categorized as: a "master bathroom", containing a shower and a bathtub, adjoining the largest bedroom; a "full bathroom" (or "full bath"), containing a toilet, a sink, and either a bathtub with a shower or a bathtub and a separate shower stall; "half bath" (or "powder room") containing just a toilet and a sink; or "3/4 bath" containing a toilet, a sink, and a shower. However, usage varies; in some U.S. markets, a toilet, sink, and shower are considered a "full bath", and outside real estate the term "bathroom" is commonly used for a room containing a toilet and a wash basin, and nothing else. In Canada, "washroom" is the preferred term for such a room in both homes and public facilities.

Design considerations

Towels Bathrooms often have one or more towel bars or rings for hanging towels.

Furniture

Some bathrooms contain a bathroom cabinet for personal hygiene products and medicines, and drawers or shelves (sometimes in column form) for storing towels and other items.

Bidet

Some bathrooms contain a bidet, which might be placed next to a toilet.

Plumbing The bathroom design must account for the use of hot and cold water, in significant quantities, for cleaning the body. The water is also used for moving solid and liquid human waste to a sewer or septic tank. Water may be splashed on the walls and floor, and hot humid air may cause condensation on cold surfaces. From a decorating point of view, the bathroom presents a challenge. Ceiling, wall, and floor materials and coverings should be impervious to water and readily and easily cleaned. The use of ceramic or glass, as well as smooth plastic materials, is common in bathrooms for their ease of cleaning. Such surfaces are often cold to the touch, however, so water-resistant bath mats or even bathroom carpets may be used on the floor to make the room more comfortable. Alternatively, the floor may be heated, possibly by strategically placing resistive electric mats under the floor tile or radiant hot water tubing close to the underside of the floor surface.

Electricity Electrical appliances, such as lights, heaters, and heated towel rails, generally need to be installed as fixtures, with permanent connections rather than plugs and sockets. This minimizes the risk of electric shock. Ground-fault circuit interrupter electrical sockets can reduce the risk of electric shock, and are required for bathroom socket installation by electrical and building codes in the United States and Canada. In some countries, such as the United Kingdom, only special sockets suitable for electric shavers and electric toothbrushes are permitted in bathrooms and are labelled as such. UK building regulations also define what type of electrical fixtures, such as light fittings (i.e. how water-/splash-proof) may be installed in the areas (zones) around and above baths, and showers.

Lighting

Bathroom lighting should be uniform, and bright and must minimize glare. For all the activities like shaving, showering, grooming, etc. one must ensure equitable lighting across the entire bathroom space. The mirror area should have at least two sources of light at least 1 foot apart to eliminate any shadows on the face. Skin tones and hair color are highlighted with a tinge of yellow light. Ceiling and wall lights must be safe for use in a bathroom (electrical parts need to be splashproof) and therefore must carry appropriate certification such as IP44. All forms of bathroom lighting should be IP44 rated as safe to use in the bathroom.

History

The first records for the use of baths date back as far as 3000 B.C. At this time water had a strong religious value, being seen as a purifying element for both body and soul. So it was not uncommon for people to be required to cleanse themselves before entering a sacred area. Baths are recorded as part of village or town life throughout this period, with a split between steam baths in Europe and America and cold baths in Asia. Communal baths were erected in a distinctly separate area from the living quarters of the village.

Nearly all of the hundreds of houses excavated had their bathing rooms. Generally located on the ground floor, the bath was made of brick, sometimes with a surrounding curb to sit on. The water drained away through a hole in the floor, down chutes or pottery pipes in the walls, and into the municipal drainage system. Even the fastidious Egyptians rarely had special bathrooms.

Greek and Roman bathing

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Bathroom

Start with the simplest possible case. Write down what Bathroom 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 Bathroom 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 Bathroom 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 Bathroom

In research: Bathroom 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 Bathroom 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: Bathroom is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bathing, Bathrooms, Rooms, so understanding it makes those chapters shorter.
In everyday life: Look for Bathroom 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.

How to study Bathroom in 20 minutes

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

Frequently asked questions

What is Bathroom in simple terms?

A bathroom is a room in which people wash their bodies or parts thereof. It can contain one or more of the following plumbing fixtures: a shower, a bathtub, a bidet, and a sink (also known as a wash basin in the United Kingdom).

Why does Bathroom 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 Bathroom?

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 Bathroom.