A is a storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings

Closed flask

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Vacuum flask

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Conducting flask

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None of these

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Solution

The correct option is B Vacuum flask
A thermoflask is a storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings. As thermoflask is designed to prevent heat loss by conduction, convection and radiation.

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A is a storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings

The correct option is B Vacuum flaskA thermoflask is a storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings. As thermoflask is designed to prevent heat loss by conduction, convection and radiation.

The correct option is B Vacuum flask
A thermoflask is a storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings. As thermoflask is designed to prevent heat loss by conduction, convection and radiation.