How does thermal pot keep the liquid inside it hot?

1 Answer

Answer :

Most thermal pots use a vacuum flask inside. The inner and outer walls are separated by a vacuum. The only way heat is transferred from inner to outer walls is by radiation.

Related questions

Description : What can I use to clean a thermal pot Mine has crusty looking white stuff in it.?

Last Answer : The crusty looking white stuff are mineral deposits from hard water and are called scales. You can either buy a de-scaling solution from any hardware store or you can do it yourself. To do it yourself, ... thermal pot for 10-15 minutes. Most of the white scales should be gone from your thermal pot.

Description : Why does a liquid remain hot or cold for a long time inside a thermo flask?

Last Answer : Ans: Because of the presence of air, which is poor conductor of heat, in between the double glass walls of a thermos flask.

Description : How do we get cool water from a clay water pot on hot sunny days?

Last Answer : A clay water pot, also known as an "earthenware pot" or "un glazed clay pot," is a traditional method for storing and cooling water on hot sunny days. The process works through a process ... the evaporation more efficient and should be covered to prevent debris and dust from getting in the water.

Description : Should my Crock Pot be hot on the outside?

Last Answer : Some brands are insulated on the outside, so are cooler. I have four and only one is cooler to touch the rest are HOT.

Description : Late afternoons I often bathe. I'll soak in water piping hot. My essence goes through my see through clothes. Used up am I; I've gone to pot. What am I? -Riddles

Last Answer : I'm a tea bag!

Description : Is adding hot water to pot noodles a physical change?

Last Answer : Adding hot water to pot noodle is a physical change because thechemical nature of water remain unchanged.

Description : What if your spoon is hot after leaving it in the pot that was on the stove is that conduction?

Last Answer : Feel Free to Answer

Description : What if your spoon is hot after leaving it in the pot that was on the stove is that radiation convection condition?

Last Answer : Feel Free to Answer

Description : Budget Vegetable Hot Pot

Last Answer : A hearty stew to keep away the winter chills. 2 x 15 ml spoons/2 tbsp vegetable oil 1 onion, chopped 2 large carrots, peeled and chopped 1 potato, diced 1 small turnip, peeled and ... all tender and the barley cooked. Boil rapidly for a few minutes to reduce and thicken the sauce slightly.

Description : Could the food in the pot (on the stove) burn with the liquid still in it?

Last Answer : answer:If the liquid is fat, then yes, the food can burn. Also, some foods will scorch on the bottom of the pan even if there’s still quite a bit of liquid. Thick mixtures are most likely to do this.

Description : Is it rust at the bottom of the pot (inside) and how do you remove it if it's smooth?

Last Answer : White vinegar. Pour some in there and let it soak for a week or two.

Description : How can I fix this Mic gain pot inside President Grant 2 premium for FM deviation as broken what can I replace it with?

Last Answer : See if your library has a Howard W. Sams Photofacts folder forthat unit to determine the correct part.

Description : When simmering a pot roast do you always keep the cover on? The recipe that I'm using did not specify.

Last Answer : My grandmother always leaves the cover on except for the occasional peak to check on the roast. Good Luck!

Description : What do you put in bottom of pot to keep dirt from falling through water holes

Last Answer : There are plastic drainage flat that goes in alot of store bought plants....looks like a frisbee with holes. Personally, I like the more natural, sustainable materials. Best way, I have found, is bark, or ... or rock bottom, a little cheese cloth on the hole works, or a piece of an old sock. LOL.

Description : Can I keep Lovage outside in a pot in NC over the winter?

Last Answer : Need Answer

Description : can you keep peonies in a pot over winter

Last Answer : You can plant them right now in the ground. This is the time to do it....

Description : How does geothermal energy flow of thermal energy from hot to cold or cold to hot?

Last Answer : When the weather is cold, the water or refrigerant heats up as it travels through the part of the loop that's buried underground. Once it gets back above ground, the warmed water or refrigerant transfers heat into the building. The water or refrigerant cools down after its heat is transferred.

Description : Thermal algae can live in: (a) Saline soil (b) Hot water streams of 70°C (C) Deserts (d) Snow balls

Last Answer : Ans. ((b))

Description : What is the source of natural energy of the hot springs at Manikaran in Himachal Pradesh? (1) Geothermal Energy (2) Biomass Energy (3) Thermal Energy (4) Hydro Energy

Last Answer : (1) Geothermal Energy Explanation: Manikaran is famous for hot springs that are produced by the emergence of geothermally heated groundwater that rises from the Earth's crust. The water from hot ... is heated in this manner. An experimental geothermal energy plant has also been set up here.

Description : Many blue-green algae occur in thermal springs (hot-water springs). The temperature tolerance of these algae have been attributed to their (a) mitochondrial structure (b) importance of homopolar bonds in their proteins (c) cell wall structure (d) modern cell organization.

Last Answer : (c) cell wall structure

Description : The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is ... is (A) 100,000 kW (B) 160,000 kW (C) 200,000 kW (D) 320,000 kW

Last Answer : (D) 320,000 kW

Description : Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the (A) Cold reservoir approaches zero (B) Hot reservoir approaches infinity (C) Either (A) or (B) (D) Neither (A) nor (B)

Last Answer : C) Either (A) or (B)

Description : Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature. (A) Copper (B) Steel (C) Aluminium (D) Brass

Last Answer : Option A

Description : Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature. (A) Copper (B) Steel (C) Aluminium (D) Brass

Last Answer : Option A

Description : Due to which of the following reasons the cables should not be operated too hot ? (a) The oil may loose its viscosity and it may start drawing off from higher levels (b) Expansion of the ... instability may rise due to the rapid increase of dielectric losses with temperature (e) All of the above

Last Answer : (e) All of the above

Description : The thermal and electric pulp tests will, A. Give an accurate indications of the pulp status B. The patient’s response will be either pain or no pain C. The patient can differentiate between cold or hot stimuli

Last Answer : A. Give an accurate indications of the pulp status

Description : Thermal pollution is more common near a) Hot water springs b) Coal based power plants c) Tropical regions d) Temperate regions. 

Last Answer : b) Coal based power plants 

Description : Superconductivity is a material property associated with - (1) cooling a substance without a phase change (2) frictionless liquid flow (3) a loss of thermal resistance (4) a loss of electrical resistance

Last Answer : (3) a loss of thermal resistance Explanation: Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic flux fields occurring in certain materials, called superconductors.

Description : Which of the following in the correct device that converts thermal energy into electrical energy? (1) constant volume gas thermometer (2) liquid-in-glass thermometer (3) thermopile (4) none of these

Last Answer : (3) thermopile Explanation: A thermopile is an electronic device that converts thermal energy into electrical energy.

Description : Thorium can be converted into U-233 in a __________ reactor. (A) Liquid metal cooled (B) Fast breeder (C) Thermal (D) Swimming pool

Last Answer : (B) Fast breeder

Description : Power consumption during turbulent flow in agitation tank is proportional to the __________ of the liquid. (A) Viscosity (B) Thermal conductivity (C) Surface tension (D) Density

Last Answer : (D) Density

Description : The type of liquor circulation system to be ' employed in evaporators (viz. natural or forced circulation) is determined mainly by the __________ of the liquid. (A) Viscosity (B) Density (C) Thermal conductivity (D) Corrosive nature

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Description : Thermal conductivities of most of the liquids __________ with rise in temperature. (A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depends on the liquid

Last Answer : (B) Decreases

Description : Pick out the wrong statement: (A) The capacity of an evaporator is reduced by the boiling point elevation (B) Corrosive liquid is normally passed through the tubes in a ... recompression evaporator (D) Heat sensitive materials should be concentrated in high pressure evaporators

Last Answer : (D) Heat sensitive materials should be concentrated in high pressure evaporators

Description : Pick out the wrong statement. (A) Bubble size increases with the dynamic viscosity of the liquid in case of nucleate pool boiling (B) Thermal conductivity of a dry material is more than ... in kg/hr in an evaporator (D) Vaporisation of organic substances in evaporator mostly causes foam formation

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Description : Velocity of liquid hydrocarbon fuels in a pipeline cannot be measured by magnetic flow-meters, because their __________ is very low/small. (A) Thermal conductivity (B) Electrical conductivity (C) Specific gravity

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Description : Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses: w) fissionable plutonium-239 as fuel. x) a relatively low heat output. y) neutrons moderated to relatively low energies. z) liquid sodium as a coolant.

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Description : The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2 . The temperature of the inside wall is - 5°C. The outside wall temperature is (A) 25°C (B) 30°C (C) 35°C (D) 40°C

Last Answer : (C) 35°C

Description : . If Prandtl number is greater than the Schmidt number, then the (A) Thermal boundary layer lies inside the concentration boundary layer (B) Concentration boundary layer lies inside the thermal boundary ... (D) Hydrodynamic (i.e., momentum) boundary layer is thicker than the other two

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Description : Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is 3k/l'. If the wall temperature ... wall temperature in degree centigrade? (A) 35.5 (B) 43.75 (C) 81.25 (D) 48.25

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Description : A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place (A) The better insulation material should be put just ... to which insulating material is to be put inside (i.e., just next to the pipe)

Last Answer : (A) The better insulation material should be put just next to pipe (i.e., inside)

Description : Why do you suppose it is that every vacuum bottle or such thermal device I’ve tried inevitably declines in its ability to keep things cold?

Last Answer : Such insulating vessels are designed with a vacuum layer, that prevents heat transfer through conduction. I would postulate that over time, air slowly diffuses into that vacuum chamber, robbing it of its insulating properties.