Are the tips on the Internet always true and false? Click on the video to learn about 5 life tips that are really effective and have some scientific principles:
repair data line
People sometimes buy “heat-shrink tubing” to fix broken cables: plastic tubing that shrinks when heated to wrap tightly around the breakage.
In fact, the packaging film on the beverage bottle can also act like a heat shrinkable tube . The plastic films are pre-stretched so that they shrink automatically when heated, which is why they fit the drink bottle perfectly.
Heat-shrinkable packaging film can fit bottles of various shapes | Photographed by the author
Differentiate between old and new batteries
Accidentally mixed old and new batteries together? If you want to tell them apart, you can test the battery’s ability to bounce. New batteries are less likely to rebound when dropped on the table, while old batteries jump higher (※ only applicable to alkaline batteries).
This difference is caused by structural changes inside the battery. The zinc anode of an alkaline battery is a gel-like substance containing zinc powder. The gel easily absorbs shocks, so it is not easy to rebound when a new battery is dropped. And as the battery discharges, the zinc reacts to form zinc oxide, and the gel becomes a harder solid — making it easier for the old battery to bounce back.
Alkaline Battery Capacity vs. Bounce Height | Shoham Bhadra et al.
This is the most popular tip in this issue: someone has published a paper specifically for it [1] .
Remove all-purpose glue
502 glue stuck the handle? Don’t worry, nail polish remover can help you out. The organic solvent acetone dissolves the polymers that superglue forms, helping to break the bond—an ingredient found in many nail polish removers .
Also, if there is only a small amount of residual glue on the skin, it’s fine to leave it alone. Human epidermal cells are constantly renewed, and the glue will eventually fall off with the epidermis – as the saying goes, time solves all problems (hey).
Judging the hot pot temperature
Drop a little water and watch it boil, this will show how hot the pot is.
The Leidenfrost phenomenon | Savant-fou/Wikipedia
When a liquid encounters a surface far beyond its own boiling point, the contact surface vaporizes rapidly, forming an air cushion to hold up the round droplet—this is the Leidenfrost phenomenon. For water on a hot pan, the critical temperature to reach this state is about 193°C .
The method of judging the temperature of a hot pan by the Leidenfrost phenomenon can be used for iron pans or stainless steel pans. Please do not cook Teflon non-stick pans empty for a long time.
Removing Red Wine Stains
Red wine spilled on clean white clothes/tablecloth? You can try to remove it with white wine.
Red wine gets its color from anthocyanins, substances that can be dissolved in water, but a mixture of water and ethanol is better at dissolving and extracting them than pure water —colorless spirits with about 50 percent alcohol are fine. This method is also suitable for stains of fruit juices such as cherries and grapes. Of course, it is most important to start cleaning immediately.
references
[1] https://ift.tt/a0EsICo
Author: Window Knock Rain
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