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How does a tight fitting plastic stopper on a flask minimise heat transfer?
Wiki User
∙ 11y ago
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.
Wiki User
∙ 11y ago
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How can the structure of the vacuum flask minimise energy transfer by conduction convection and radiation?
The flask has a double wall, with no air between the two walls (vacuum)- conduction. The walls are highly reflective silver- radiation. the flask has a small beck that is closed by a stopper or cap-convection.
What is the density of a cork?
The density of a wooden cork stopper is about 0.25 grams per ml. This value can be important in experiments where a cork stopper is used.
Why is it important to touch a charged object to the metal rod of an electroscope and not to the rubber stopper?
it is important because if you don't and touch the rubber stopper it will not show if it is positive.
Is a door stopper a wedge or a inclined plane?
A doorstopper is and example of a wedge.
When glass stopper in a bottle is stuck it may sometimes be loosened by holding the neck of the bottle under a hot water faucet explain the physical principle responsible for this observed phenomenon?
With a few exceptions (notably melting ice) objects expand when heated. If you run hot water on a bottle neck, the heat is applied directly to the bottle and only indirectly to the stopper inside the bottle, so the bottle heats first, and thereby expands sooner than the stopper does. An expanded bottle will exert less pressure on the stopper.
How does the structure of a vacuum flask minimise energy transfer?
The vacuum between the two layers cannot conduct heat.The silvering on the inside reflects heat back to the contents.The stopper prevents heat loss by convection.The stopper is made of poor thermal conductors.
What are the reasons for the using glass-stopper bottles for acids and plastic stoppered bottles for bases?
If strong bases are present in the glass-stopper bottles, they may react with the glass and etch it or change the concentration of the base. Hence plastic-stopper bottles are used for bases.
How can the structure of the vacuum flask minimise energy transfer by conduction convection and radiation?
The flask has a double wall, with no air between the two walls (vacuum)- conduction. The walls are highly reflective silver- radiation. the flask has a small beck that is closed by a stopper or cap-convection.
Does cooks champagne have a cork or plastic stopper?
a cork regards ´LG
Stopcock, Plastic Stopper, can react the sulphuric acid. is it working or not?
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How do you fix a broken clip on a phiten necklace?
Things you need: -rubber stopper bead -plastic clasp-scissors-knowledge of sewing What to do: 1st. cut the end right at the bottom of the loop, then if there is any piece of the clasp left remove it. After that slip the rubber stopper bead on the single strand then but on one half of the plastic clasp, next make a loop and sew it to the strand after that you slip the rubber stopper bead up. continue on the other side. Now the problem is finding the supplies (plastic clasp and rubber stopper bead)
Why must reagents stopper be laid upside down?
If they are laid so that the part of the stopper that is in the bottle is able to touch the workbench, then they can either pick up contaminants that will transfer to the liquid when replacing the stopper, or they can transfer small quantities of possibly corrosive or toxic liquids, that they have picked up when the bottle was shaken or moved, to the workbench surface that can subsequently produce a safety hazard.
How do you add oil to a 1980 Camaro?
Look for the valve cover. There should be a stopper or plastic screw off thing.
Function of cork borer?
Very simple answer: to make a hole in a cork or plastic stopper; the scope is to insert a tube, thermocouple, thermometer, etc.
Is stopper or stoper spelled correctly?
it is stopper =]
Purpose of a hemoguard stopper on an ets tube?
The purpose of a Hemoguard stopper on an ETS tube is to prevent any blood or fluid from leaking out of the tube during transportation or handling. The Hemoguard stopper is designed to create a tight seal and provide a barrier against any potential leaks or contamination. This helps ensure the integrity of the sample and maintain the accuracy of test results.
What is a bleeding stopper?
Styptic pencil is a bleeding stopper.
