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What else can I help you with?
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.
A jar lid and a corkscrew are what?
Examples of an inclined plane.
What do you do when you can't open a jar?
run lid over hot water and open with a cloth over lid.
Why do you use hot water to remove a tight metal cap easily?
Often, lids are made of metals which are great conductors of electromagnetic waves (including heat). When warm water is applied to a "difficult" lid, excitement of the atoms in the metal occurs (very slight) which causes a slight expansion. This expansion helps the lid to be moved from it's grip on the jar or bottle. This is also found in plastics. Although not through expansions. The heat from the warm water literally softens the plastic.
What would happen if a jar loose fitting lid were placed in a freezer?
What's in the jar? If you mean water, the ice *should* extrude out of the jar a little way without bursting it.
Is jar lid a screw?
Yes, a jar lid can have a screw-on design to secure it tightly onto the jar. This type of lid is commonly used for sealing jars to keep the contents fresh and prevent leakage.
Why you must heat up the lid of a jar to make it easier to open?
Heating up the lid of a jar causes it to expand slightly, which can help break the seal between the lid and the jar. This makes it easier to open because the expanding metal in the lid relieves some of the pressure that is holding the lid tightly in place.
Use the word pry in a sentence?
I used all the force I could to pry open the tightly closed lid on the pickle jar.
How do you airtight jars?
You can make an Jar Airtight by hooking up a machine that pulls the air out of it and selas the top or you can place the jar into boiling water to heat the contents of the jar. as the contents cool it will pull the lid tight on the jar making an air tight seal.
A jar lid is an example of what simple machine?
some are screws (wedge), but others aren't.
How do you make a snow globe when my jar has no lid?
You need a jar with a lid or it won't work.
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.
How does heat cause a jar to seal tight when in general heat causes objects to expand?
Heat should not cause a jar to seal more tightly. There is an excellent reason for this, and it lies in the physics of the coefficient of thermal expansion (CTE) of materials. If you run hot water on the (stuck) lid of a glass jar, the jar will undergo only a little thermal expansion. The metal lid however, will expand more than the glass, and will do it more rapidly, too. Running a jar under a bit of hot water should act to loosen the lid instead of tighten it. The CTE of metals is higher than that of glass, and the lid, because it is metal, will also have a higher rate of thermal conductivity than the glass. Thermal energy will move through it more quickly to change its size. This double whammy should not cause the lid of the jar to tighten. If the lid is still stuck, then insufficient force has been applied to it to get it unstuck. Increased care is indicated as efforts are redoubled to remove the lid.
A jar lid is an example of what type of simple machine?
A screw, which is basically a wrapped incline.
If a jar has its lid on with water and salt in the jar does it evaporate?
no
Why we can heat up the lid of a jar to make it easier to open?
Heating the lid of a jar causes the metal to expand, breaking the seal between the lid and the jar. This makes it easier to open because the pressure inside the jar is released, reducing the force needed to twist the lid off.
What open lid mean?
A lid that has been removed from a jar.
