question: Why does bath water seems so hot when it’s usually body temp?
comment: That's because you body is usually on room temperature, also your body temperature varies (if you ever say those movies where they show infra-red vision) - its naturally coldest on the outside. (Which is why if you stick a finger in your mouth, it feels warm)...I digress. So you feel warmer when you are in a bath at 32° C, because your body/skin is used to colder temperatures.
passages: Section::::History.:Etymology.
   Skin wettedness is defined as "the proportion of the total skin surface area of the body covered with sweat."
   Heated bath
  
  A heated bath is used in the laboratory to allow a chemical reaction to occur at an elevated temperature. 
  
  The heated bath is a fluid placed in an open (metal) pot. Water and silicone oil are the most commonly used fluids. A water bath is used for temperatures up to 100 °C. An oil bath is employed for temperatures over 100 °C.
   Research has tested the model against experimental data and found it tends to overestimate skin temperature and underestimate skin wettedness. Fountain and Huizenga (1997) developed a thermal sensation prediction tool that computes SET.
  
  Section::::Models.:PMV/PPD method.:Local thermal discomfort.
   Scalding is a serious concern with any water heater. Human skin burns quickly at high temperature, in less than 5 seconds at , but much slower at — it takes a full minute for a second degree burn. Older people and children often receive serious scalds due to disabilities or slow reaction times. In the United States and elsewhere it is common practice to put a tempering valve on the outlet of the water heater. The result of mixing hot and cold water via a tempering valve is referred to as "tempered water".
   Section::::Types of water bath.:Non-Circulating Water Baths.
  
  This type of water bath relies primarily on convection instead of water being uniformly heated. Therefore, it is less accurate in terms of temperature control. In addition, there are add-ons that provide stirring to non-circulating water baths to create more uniform heat transfer.
  
  Section::::Types of water bath.:Shaking Water Baths.
  
  This type of water bath has extra control for shaking, which moves liquids around. This shaking feature can be turned on or off. In microbiological practices, constant shaking allows liquid-grown cell cultures grown to constantly mix with the air.
   BULLET::::- One of the highly potential geothermal energy reservoirs in India is the Tattapani thermal springs of Madhya Pradesh.
  
  Section::::Etiquette.
  
  The customs and practices observed differ depending on the hot spring. It is common practice that bathers should wash before entering the water so as not to contaminate the water (with/without soap). In many countries, like Japan, it is required to enter the hot spring with no clothes on, including swimwear. Typically in these circumstances, there are different facilities or times for men and women. In some countries, if it is a public hot spring, swimwear is required.
  
  Section::::See also.
   Water typically enters residences in the US at about , depending on latitude and season. Hot water temperatures of are usual for dish-washing, laundry and showering, which requires that the heater raise the water temperature about if the hot water is mixed with cold water at the point of use. The Uniform Plumbing Code reference shower flow rate is per minute. Sink and dishwasher usages range from per minute.
   Taking advantage of the cooling properties of water may help attenuate the consequences of heat sensitivity. In a study done by White et al. (2000), exercise pre-cooling via lower body immersion in water of 16–17 °C for 30 minutes allowed heat sensitive individuals with MS to exercise in greater comfort and with fewer side effects by minimizing body temperature increases during exercise. Hydrotherapy exercise in moderately cool water of 27–29 °C water can also be advantageous to individuals with MS. Temperatures lower than 27 °C are not recommended because of the increased risk of invoking spasticity.
  
  Section::::History.
   Blood circulation transports heat throughout the body, and adjustments to this flow are an important part of thermoregulation. Increasing blood flow to the surface (e.g., during warm weather or strenuous exercise) causes warmer skin, resulting in faster heat loss. In contrast, when the external temperature is low, blood flow to the extremities and surface of the skin is reduced and to prevent heat loss and is circulated to the important organs of the body, preferentially.
  
  Section::::Physiology.:Rate of blood flow.
   Bath was charged with responsibility for the hot springs in a Royal Charter of 1591 granted by Elizabeth I. This duty has now passed to Bath and North East Somerset Council, who carry out monitoring of pressure, temperature and flow rates. The thermal waters contain sodium, calcium, chloride and sulphate ions in high concentrations.
   Although details of services were left to bathhouse operators, the Park's superintendent set various rules. In the 1930s a tub bath could not take more than 20 minutes and shower no more than 90 seconds. During the next decade shower time was reduced to a minute, with maximum temperatures specified for several services. After a bath of about , the patient might spend 2–5 minutes in a vapor cabinet, get 15 minutes of packs (wet, hot or cold), followed by a tepid needle shower and light massage and alcohol rub.
   Thomas Guidott set up a medical practice in the English town of Bath in 1668. He became interested in the curative properties of the waters. In 1676, he wrote "A discourse of Bathe, and the hot waters there. Also, Some Enquiries into the Nature of the water". This brought the health-giving properties of the hot mineral waters to the attention of the aristocracy. Doctors and quacks set up spa towns such as Harrogate, Bath, Matlock and Buxton soon after taking advantage of mineral water from chalybeate springs.
  
  Section::::History.:18th century.
  
  Section::::History.:18th century.:England.
   Bath's representation was reduced to a single member in 1918. The Conservatives held the seat continuously until 1992, except in the 1923 Parliament, and until World War II generally won comfortably – the Liberals retained such strength that the non-Conservative vote was split, and Labour could not rise above third place until the landslide of 1945, when the Conservative James Pitman achieved a very marginal majority. From 1945 to 1970, Labour presented the main challenge, and came within 800 votes of taking the seat in 1966 (which is, to date, the closest Labour have come to winning the constituency).
   (Illustrated by a still lake, where the surface water can be comfortably warm for swimming but deeper layers be so cold as to represent a danger to swimmers, the same effect as gives rise to notices in London's city docks warning 'Danger Cold Deep Water).
   Since the 1950s in cities, towns and many rural areas more comfortable dwelling became a nationally required standard, and almost all apartments are designed with both cold and hot water supply, and a bathroom with a bathtub, but a percentage of people living in them still go to public steam baths for health treatments with steam, tree branches, aromatic oils.
  
  Section::::See also.
  
  BULLET::::- Bathing
  
  BULLET::::- Steam shower
  
  BULLET::::- Water park
  
  BULLET::::- By culture
  
  BULLET::::- Gymnasium (ancient Greece)
  
  BULLET::::- Banya – Russian
  
  BULLET::::- Sauna – Finnish
  
  BULLET::::- Hammam – Turkish
  
  BULLET::::- Hanjeungmak & Jjimjilbang – Korean
   The predecessor of the modern bath was a former "hamam", or the Turkish bath. Called "Small Hamam", it was recorded in the Turkish plan from 1863, but it probably originated from the 18th century.
   Scalds can be more severe when steam impinges on the naked skin, because steam can reach higher temperatures than water and transfers latent heat by condensation. On the other hand when clothes are soaked with hot water the heat transfer is often of a longer duration since the body part can not be removed from the heat source as quickly. 
   Bathers are not normally allowed to wear swimsuits in the baths. However, some modern "onsen" with a water park atmosphere require their guests to wear a swimming suit in their mixed baths.
  
  Section::::Etiquette.:Towels.
   Temperature-controlled warm-water therapy pools are used to perform aquatic bodywork. For example, Watsu requires a warm-water therapy pool that is approximately chest deep (depending on height of the therapist) and temperature-controlled to about 35 °C (95 °F).
  
  Section::::Facilities, equipment, and supplies.:Dry-water massage tables.
   Unlike a hammam, Victorian Turkish baths use hot, dry air; in the Islamic hammam the air is often steamy. The bather in a Victorian Ottoman bath will often take a plunge in a cold pool after the hot rooms; the Islamic hammam usually does not have a pool unless the water is flowing from a spring. In the Islamic hammams, the bathers splash themselves with cold water.
   The bathhouses began using vapor cabinets around 1884. The bather sat in the cabinet for 10–20 minutes with the lid closed tightly around the neck, with vapor from the hot water rising through the floor of the cabinet, with temperatures around . Toward the end of the 1880s Russian and Turkish baths were offered, and in the 1890s German needle baths and Scotch douches (concentrated stream of hot or cold water, often used on the back) were added.
   Section::::History.
   There are many geothermal springs in the UK, but the hot springs found in the town of Bath are the only true hot springs (defined as those hotter than 37 degrees C):
  
  BULLET::::- Cross Bath, Bath, Somerset 42.8 degrees C, 109 degrees F
  
  BULLET::::- Stall Street Fountain, Bath, Somerset 45.4 degrees C, 113.7 degrees F
  
  BULLET::::- Hetling Spring, Bath, Somerset 45.4 degrees C, 113.7 degrees F
  
  BULLET::::- King's Bath, Bath, Somerset 45.6 degrees C, 114 degrees F
  
  BULLET::::- Hot Bath, Bath, Somerset 47.2 degrees C, 117 degrees F
  
  There are other thermal or warm springs in the U.K and include;
   Some facilities use once-through cooling (OTC) systems which do not reduce temperature as effectively as the above systems. For example, the Potrero Generating Station in San Francisco (closed in 2011), used OTC and discharged water to San Francisco Bay approximately 10 °C (20 °F) above the ambient bay temperature.
  
  Section::::Sources and control of thermal pollution.:Urban runoff.
  