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What else can I help you with?
Why pear shaped flask is used instead of round bottom flask?
even distribution of heat
The color of a vacuum flask in the inside?
The inside of a vacuum flask is typically silver or metallic in color. This reflective surface helps to maintain the temperature of the contents by reflecting heat back into the flask or minimizing heat transfer through radiation.
How much heat energy is produced when 22 grams of propane is burned in a stove?
To determine the heat energy produced when burning propane, we need to know its heat of combustion, which is approximately 50 MJ/kg. For 22 grams (0.022 kg) of propane, the energy released can be calculated as follows: 0.022 kg × 50,000 kJ/kg = 1,100 kJ. Therefore, burning 22 grams of propane produces about 1,100 kJ of heat energy.
Is burning newspaper a physical change?
Yes, burning newspaper is a chemical change because it undergoes a chemical reaction (combustion) that changes its chemical composition. The heat and flame produced during burning are evidence of this chemical reaction taking place.
Why is the inside part of the thermos flask shiny?
It helps to insulate the thing inside the thermo flask. The heat or coldness outside the flask gets reflected away. It might sound silly but it is true
How does heat transfer in a flask?
Heat transfer in a flask occurs through conduction - the heat energy moves from the hot liquid inside the flask to the walls of the flask. The rate of heat transfer depends on the thermal conductivity of the material the flask is made of. Additionally, heat can also be lost or gained through convection if the flask is open to the surrounding environment.
What is electical energy produced by?
What is electrical energy produced by burning fossils to produce heat, which turns the generator.
What is the calorific value of sand?
Sand? burning in an engine? No. No. NO. Calorific value is the heat produced by burning fuel. Sand won't burn.
What is the source of the energy that produces steam?
Heat will produce steam. The heat itself can be produced by different means; but the most common one is burning something, i.e., chemical energy.Heat will produce steam. The heat itself can be produced by different means; but the most common one is burning something, i.e., chemical energy.Heat will produce steam. The heat itself can be produced by different means; but the most common one is burning something, i.e., chemical energy.Heat will produce steam. The heat itself can be produced by different means; but the most common one is burning something, i.e., chemical energy.
What is energy produced from LPG stove?
Energy is produced from an LPG stove by burning liquefied petroleum gas (LPG) which releases heat energy. This heat energy is used to cook food or heat a space.
What is the main cause of heat loss in a normal thermos flask?
The main heat loss in a good thermos flask, is due to heat conducted through the material. (Glass or Stainless Steel). There should be little heat lost through the vacuum of the flask.
How does a flask reduce heat loss by conduction and radiation?
Using vacuum as an insulator avoids heat loss by conduction. Heat transfer is minimised by reflective silver surfaces that are applied to the flask. This prevents thermal radiation from entering and escaping the flask.
How does a tight fitting plastic stopper on a flask minimise heat transfer?
It prevents heat transfer by convection as it prevents contact between the surrounding air and air inside the flask. It prevents heat transfer by conduction as it is a poor conductor of heat.
What two features of a vacuum flask help reduce heat loss by conduction?
The vacuum layer between the inner and outer walls of the flask prevents conduction of heat as there are no particles or molecules to transfer heat. The reflective surface coating on the inner wall of the flask helps to minimize heat transfer by reflecting heat back towards the liquid inside the flask.
Is heat non-renewable?
No, heat is not non-renewable. Heat energy can be generated using renewable sources such as sunlight, geothermal heat, or biomass. Renewable sources of heat ensure that energy can be continuously produced without depleting finite resources.
How does the cork of the vacuum flask reduces heat?
The cork in a vacuum flask acts as an insulator, minimizing the flow of heat between the inside and outside of the flask. This helps to maintain the temperature of the contents by reducing heat transfer through conduction and convection. The cork creates a barrier that traps air and prevents heat from escaping or entering the flask efficiently.
Why are shiny outer surfaces needed in a vacuum flask?
The outer surfaces do not need to be shiny. The interior ones do, to reflect heat back rather than let the heat pass out of the vacuum flask. The vacuum between the double walls of the flask also reduces heat loss.
