Thermos

What is a thermos?

• A Thermos is an insulated beverage container (it’s made to keep drinks hot or cold for longer). It minimizes heat transfer due to conduction, convection and radiation.

• A Thermos is a beverage heater. It transfers heat to a drink to make it hot.

• A Thermos is a refrigerated beverage container. It removes heat from a drink to make it cool.

• A Thermos is a beverage maker. It mixes the ingredients of beverages by stirring, whipping, blending, and chopping them. They are useful in making smoothies, slushies, and other mixes.

Which parts are commonly found in thermoses? Check all that apply

• Insulated support

• Inner bottle

• Outer bottle

• Silvered surfaces

• Cap

What is a vacuum?

• A space or container that is filled with matter, making it very dense and difficult to pass through.

• A space or container where there is no matter. There is not even air (no molecules).

• A space or container with no liquids or solids inside, only air.

• A space or container where the dust and dirt from the floor are collected.

What methods of heat transfer does a vacuum barrier between two bottles eliminate? Choose all that apply.

• Conduction

• Convection

• Radiation

• Translation

What methods of heat transfer does a vacuum barrier between two bottles NOT eliminate? Choose all that apply.

• Conduction

• Convection

• Radiation

• Translation

What is the main purpose of the silvered surfaces on the inner bottle?

• To reduce heat loss due to conduction. Shiny materials are good insulators.

• To reduce heat loss due to convection. Shiny materials are known to stop convection from occuring.

• To reduce heat loss due to radiation. Shiny materials reflect heat radiation back to its source.

• To make the inner bottle look fancier so that people will pay more.

According to the reading in ASK, which of the following reduce heat loss from conduction in typical thermoses?

• glass bottles

• silver metal bottles

• cork support

• aluminum support

• vacuum barrier between the bottles

According to the reading in ASK, which of the following would reduce heat loss from radiation in typical thermoses?

• glass bottles

• silver metal bottles

• cork support

• aluminum support

• vacuum barrier between the bottles

If the thermal camera shows that the thermos is losing heat at the top, what type of heat transfer is likely to be the main problem?

• Conduction

• Convection

• Radiation

• Translation

If the thermal camera shows that the thermos is losing heat at the bottom surface, what type of heat transfer is likely to be the main problem?

• Conduction

• Convection

• Radiation

• Translation