Please click to see the video tutorial on making non-Newtonian fluids:
Tutorial on making non-Newtonian fluids, only one material is needed for DIY, the method is simple and fun to unzip
Starch can easily form a "non-Newtonian fluid" and make the liquid hard instantly as follows:
Step 1: Prepare material: beaker/starch.
Step 2: Pour a certain amount of water into the basin.
Step 3: Pour in the cornstarch again. The water to starch ratio is 1:3 and mix evenly with your hands.
Step 4: Shake the pelvis quickly. The liquid in the basin will not flow.
Step 5: You can still see cracks like tofu dregs when you move it with your fingers.
Step 6: Take a handful, knead it into a ball with your hands, spread your hands and immediately let it flow through your fingers.
Andape 7: When you stir it with your fingers, it becomes a liquid, but when you hit it with your fist, it becomes as hard as a solid.
Experimental principle: In our experiment today, the liquid obtained by mixing cornstarch and water is a "non-Newtonian fluid", including jam, whites of eggs, chewed gum, and even human blood, oil, etc. . are all “non-Newtonian fluids”.
This type of substance is between liquid and solid. When the surface is subjected to pressure, it begins to harden and acquire certain solid properties. When there is no pressure on the surface, it is very soft, like a liquid. Based on this feature, people make "non-Newtonian fluid" body armor, which is both comfortable and has better bulletproof performance.
Video tutorials and illustrations on using the prJoyoung citrus juicer
Although the maintenance-free battery basically does not need to add liquid during its life due to its structural advantages. of. But when we say maintenance free, we don't mean that they don't really require maintenance, it's just that compared to regular batteries, you don't have to worry as much about maintenance. If there is a real shortage of water, it will naturally need to be replenished, otherwise it will directly affect the normal operation of the battery. Next
Video tutorial on adding water to maintenance-free batteries
Although maintenance-free batteries basically do not need to add liquid during their life because of their structural advantages. But the maintenance-free stuff that people often talk about doesn't mean it's maintenance-free. It's just that compared to ordinary batteries, it doesn't require as muchant problems in terms of maintenance. If there is a lack of water, it must be made up, otherwise it will affect the normal operation of the battery at the same time. So how do you open a maintenance-free battery? Today we are going to bring you a tutorial video on how to add water to a maintenance-free battery.
Video tutorial on filling the maintenance-free battery
1. First use a flat blade screwdriver to open the battery weather cover, then unscrew the six plastic battery caps. .
2. Fill immediately using a hygroscopic burette. Pure water can be used until the liquid level gauge is in the middle of the upper and lower lines. Naturally, this is not a problem if it is full of oil.
Of course, some maintenance-free batteries currently on the market have the corresponding electrolyte added and blocked whenof shipping, so users cannot add filling fluid at all.
It is worth mentioning that the battery must be fully charged (not charged or discharged) before adding water. Because when the battery is turned off, the amount of electrolytic water will be much lower than normal. If added to a just saturated state when there is no electricity, a lot of water will indeed overflow when the battery is charged. This can therefore explain why a self-discharge treatment must be carried out before adding water. As for how to fill the battery, we can use the commonly used battery charging heads on the market to charge the battery. When the battery is full we can add water.
Second, maintenance-free batteries are filled with a certain amount of water solution. Only pure water or mineral water can be filled. Why do you sayus this? Since the battery has already been adjusted to the corresponding ratio after leaving the factory, if electrolyte (source fluid) is added, the ratio will naturally increase. Not only can this directly affect the normal operation of the battery, but it can also aggravate the aging of the battery pole pieces. Therefore, when everyone raises a bet, make sure you don't make a mistake.
How about Shanshui driving recorder?
I think many drivers will install a driving recorder in their car for peace of mind. Nowadays, there are many well-known brands of driving recorders of different qualities. It is important to choose a high-quality driving recorder. More and more people choose to believe in brand secrecy and use more products from big brands. However, for imp productspopular ones, such as Shanshui driving recorders, they may know very little about them. Let’s get to know each other better.
For driving recorders, many people will choose Shanshui S152 rearview mirror driving recorders are rearview mirror type recorders. They are easy to install and can be directly placed on the rearview mirror. mirror ; equipped with It has an ultra-wide camera lens, a large ultra-wide-angle lens, with a 170-degree ultra-wide-angle lens, and is suitable for 1296P high-definition video recording, which can meet various requirements for daily driving recorders; a 5.0-inch high-definition ISP screen, suitable for left and right front and rear recording system, reverse rear view, mobile phone remote monitoring, and also has battery evaluation prompts Vehicle distance and warning informationearly track deviation. functions.
In general, Shanshui driving recorders are mainly in the mid-to-low-end market, with average quality, very cost-effective price, many functions and easy to use, can meet a variety needs, and high profitability. If funds are limited and the requirements are not high, Shanshui driving recorder is worth choosing. Maintenance-free battery plusWater video tutorial How about Shanshui driving recorder @2019
People who are used to drinking juice usually have a Joyoung juicer at home . Although Joyoung juicers are easy to use, environmentally friendly and affordable, a large number of people still have many questions about how to use Joyoung juicers. Here are the methods of use, the tutorialsvideo software and illustrations. I hope they can help you.
First, check whether the parts of the juicer are complete, plug in the power and test the machine to see if the juicer works normally;
The second step is to check the machine. Finally, prepare the materials needed for juicing;
The third step is to put the materials to be juiced into the juicer cup, and then add an appropriate amount of water ( the amount of water depends on the material);
The fourth step is to screw the cup lid with the rotating blade of the juicer. The cup lid should be facing down, then align it with the unlock icon on the outer edge of it. the juice machine, press the cup, then turn it clockwise, until you hear a "click", that means the cup and the host are lockedouled;
The fifth step, plug in the power, press and hold the switch, as shown in the picture, to turn on the juice mode.
Warm reminder: It is recommended to drink the freshly squeezed juice as soon as possible, especially when it is hot. If you can't finish it, store it in the refrigerator in time. Generally, acidic juices can be kept cool for a long time and can be stored in the refrigerator for three to five days. For other juices, vegetable juices and other less acidic juices, it is recommended to drink them within 24 hours of extraction.