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Because the metal lid expands quicker than the glass jar - making it loose.
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Why is it easier to remove a metal lid off a glass jar when soaked with hot water?
The heat causes the metal lid to expand, making it slightly bigger.
Why can a jammed metal lid of a jam jar be opened by heating?
When you heat the jar, the glass expands only slightly while the metal expands much more. This is governed by the coefficient of expansion for the substance. The greater the coefficient of expansion, the more the substance expands. Since metal generally has a much higher coefficient of expansion, the lid of the jar will get bigger while the jar only expands slightly. That makes everything a little looser, which makes it much easier to open the jar.
What is the insulator in a Leyden Jar?
The glass jar.
Will a candle burn longer in a large jar then a small jar?
In a large jar as there should be more oxygen.
How do you Divide 10 ltr of water equally between 10ltr and 7ltr jar using 10 7 and 3 ltr jars?
You can do it in 9 steps. That is one of the possible solutions. Others may have a faster solution. Columns A, B, and C represent the amount of water in the 10L, 7L, and 3L jars, respectively. A B C -- -- -- 10 0 0 <-- starting point 3 7 0 <-- fill up the 7-L jar 3 4 3 <-- fill up the 3-L jar from the 7-L jar 6 4 0 <-- pour the content in the 3-L jar into the 10-L jar 6 1 3 <-- fill up the 3-L jar from the 7-L jar 9 1 0 <-- pour the content in the 3-L jar into the 10-L jar 9 0 1 <-- pour the content in the 7-L jar into the 3-L jar 2 7 1 <-- fill up the 7-L jar 2 5 3 <-- fill up the 3-L jar 5 5 0 <-- pour the content in the 3-L jar into the 10-L jar ============================
Does honey become more pliable when heated?
Honey will soften, and crystalized honey may even liquify, if it is heated. But be careful and heat it by loosening the top of the jar (don't remove it) and put the jar in a bowl of hot water, no hotter than you can bear to keep your hand in. If you overheat honey you will spoil its flavour.
What is the difference between a pressure cooker and canner?
Some things are canned in a hot water bath. They do not need to be in a pressure cooker. A canner is just a tall pot with a lid. The food in the jars is heated close to boiling with the lids loosely on. After it is heated, the jars are removed and the lids tightened. As the food cools, a vacuum will form in the jar sealing it.
Why a glass jar can be easily opened if the metal lid is heated?
because metal will expand when it has been heated up
How could hot water help you unscrew a jar's lid that is on tightly?
When something is heated, it expands, so, when you pour hot water onto a lid, it will expand slightly, making it easier to come off.
Why is it easier to remove a metal lid off a glass jar when soaked with hot water?
The heat causes the metal lid to expand, making it slightly bigger.
What happens when you put a balloon in a jar then remove all the air?
If you put an inflated balloon in a jar and then remove the air from the jar the balloon will expand. Perhaps to the point of bursting, or to the point where it coats the entire inner surface of the jar.
How do you get your finger out of a jar?
One way to get your finger out of a jar is to use a lubricant such as oil or soap around the stuck area to help ease it out. You can also try running the jar under warm water to help expand the material and make it easier to remove your finger. If these methods don't work, consider breaking the jar to free your finger, being careful to avoid injury.
If you have a jar full of marbles and you remove 100 The jar is still three-foruths full How many marbles were in the jar to start with?
easy 400
How do you change these sentences into singular form'' there are some sweets in the jar''?
There is a sweet in the jar. => change the plural-form verb are to is, remove the s from sweets to make it singular, and remove somebecause it cannot apply to singular nouns.
How do you measure the volume of water in a jam jar?
Empty the 5-liter jar and remove 1 liter of the 7-liter jar.
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.
How should Harriet test the jar lid to determine if it is successful for its intended audience?
Harriet should ask several senior citizens to evaluate whether her jar lid design is easier to use than a traditional jar lid.
