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Why a glass jar can be easily opened if the metal lid is heated?
Wiki User
∙ 13y ago
because metal will expand when it has been heated up
Wiki User
∙ 13y ago
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Why a glass jar can open easily if the metal lid is heated gently first?
Heat causes the metal to expand, thus breaking the seal.
Does glass magnetize easily?
No its not a metal.
How are Kazoos made?
Plastic - injection mold. Metal, sheet metal presses, wood - hand carved. Glass - tubes as heated and altered in a glass blowing method.
why laboratory apparatus have different kinds of materials such as woods, glass, rubber and metal?
The laboratory apparatus have different materials because of different types of experience... If you look at a beaker or text tube, it definitely have to be glass why? So that you can see the reaction through the glass and when heated it will not melt in the case of making them plastic. The metal in stands is because metal is more firm and can be easily adjusted unlike wood which can not be use for metallic functions.
What is aneling?
i think its "annealing"... if so, it is a process where both metal and glass are heated in order for them to change their/its properties.
Why is it easier opening jars after running them under hot water?
There are two main components to the answer. Both depend upon the fact that metal and glass expand when heated: 1) The metal in the lid might be a kind of metal which expands faster than glass when heated. So, if you heat the jar and the lid together to above room temperature, the lid will become a little too big for the jar, and will come off more easily. 2) If you direct the heat to the lid only, and avoid heating the glass, the lid will get hotter than the glass, and will expand, while the size of the jar remains the original size. This, too, will cause the lid to be too big for the jar, and cause it to come off more easily.
What is the advantage of using a metal pan instead of a clay pat for cooking?
Metal transfers the heat to the food well and the heat doesn't harm the metal.
Would the gap in a metal ring increase as it is heated?
Increases If the gap can easily be conceived as a small break in a metal ring, then the expansion of the metal ring may decrease the gap size.
What is the iphone 4 made out of?
Front screen: Glass (that's why its so easily broken) Sides: metal (not sure what exactly) Back panel: coloured plasic covered with glass (this, again, can break easily
Will the volume of metal decrease if it is heated?
No, the volume of a metal increases as it is heated. It expands.
Why is a tightened lid on jar easier to remove when heated?
Because the metal lid expands quicker than the glass jar - making it loose.
Which will freeze the most metal glass plastic paper and why?
The metal paper would freeze more because it is a good conductor hence easily lose heat.
