Because I am bored, I hereby record the running account here
In order to practice typing and review the plot in the future, the text is all spoilers
Please watch as appropriate
Another: I have no literary color, bad writing
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Episode 1 The Escaping Paper in the Water Truck folded in half 7 times
When the car falls into the water, there is a pressure difference between the inside and outside, the door cannot be opened, and the window cannot slide due to the pressure [true]
Method 1: Open the windows and doors as soon as possible after falling into the water [before soaking the calf]
Method 2: Wait for the car to be filled with water (balance of internal and external pressure difference) and then open the car door easily [it takes too long, the oxygen is not enough, the water is too deep, and the water is too urgent]
Method 3: Always keep sharp-edged window breakers in the car, safety hammers, spring chargers, and pillows [modern glass is broken without blades]
The paper can only be folded up to 7 times in half [inaccurate]
Depends on the thickness and ductility of the paper. If the ductility is not good, it will break and fail. If the thickness is too thick, it cannot be folded.
Fold each half once, the thickness of the fold line x2
The thickness of the final fold line is 2^n times the thickness of the original paper
Episode 2 Microwave oven boiling water speedboat extinguishing resonance pendulum
Microwave boiled water is poisonous
With plants, control experiments, the results are no problem
Microwave ovens generate high-frequency microwaves that vibrate molecules to generate heat that quickly heats food
In the video, the speedboat is turned 180 degrees to extinguish the fire with the wake [true]
The steering of the speedboat, the water flow and water mist sprayed by the engine, cover the fire source in a large area (when the distance is close enough), good flame retardant and heat absorption
Multiple metronomes are placed on a low-friction platform, and the metronomes will be synchronized [true]
Multiple metronomes placed on the same low-friction vector plane will tend to be synchronized, and the excess vibrations of each other will cancel each other out, and finally achieve a common frequency
Chain Bead Anti-Gravity Bridge Effect [True]
A substance that moves in one direction has a tendency to continue to move in this direction. When the chain head is thrown outward, the inertia continues to move outward, but gravity changes the direction of motion to make it downward. When gravity and tension are balanced (ignoring friction ), the motion state is balanced, and the trajectory left is a stable arc
Elephant toothpaste [true]
For classical chemical experiments, using hydrogen peroxide (oxidizing agent), detergent (foaming agent), yeast (catalyst), and pigment (coloring agent) to react in a small-diameter container, severe redox phenomena can be observed, and the solution produces a large amount of water. Oxygen, detergent inflates and expands, and the sprayed object is like a big toothpaste, so it is called elephant toothpaste.
You can add severe reducing agent and severe oxidizing agent to observe more severe reaction phenomenon
Explosive Snake 【True】
1. Mix sulfuric acid and sugar. Sulfuric acid is dehydrating and corrosive. It will react with sugar (carbide) to decompose sugar, generate a large amount of water and carbon, and heat and expand.
2. Dinitroaniline [pipe product] is mixed with sulfuric acid and heated and catalyzed to produce a more severe deamination reaction. Sulfuric acid dehydrates and deaminates the carbide, generates a large amount of gas, and generates carbon. The reaction process is rapid and a large amount of heat and expand.
Running water at the same frequency [true]
Generally, the shooting frequency of the camera is 24Hz. Let the water flow out through the spring-shaped thin water pipe and fall from the vicinity of the sound to produce a trajectory. When the sound frequency is the same as 24Hz, each frame of water droplets shot by the camera is the same picture. Adjust the sound frequency appropriately. , the water droplets will flow backwards from the camera.
Dry Ice Bomb 【True】
Dry ice is in a sublimation state at room temperature, and the carbon dioxide produced by sublimation will form a low-temperature gas film layer on the surface of dry ice. When immersed in water at room temperature, the water can more efficiently absorb the heat released by sublimation, resulting in more intense sublimation, rapid generation of carbon dioxide, and gas. swell. When in a closed space, if the strength of the container is low and the volatile gas pressure is stronger than the strength of the container, it will explode. Note that the dry ice pack in the fresh food has been placed in a ventilated environment to prevent carbon dioxide from accumulating and suffocating.
Episode 3 Clean Hands and Dryers Where Is the Virus Earthquake Hiding?
Dryer hands are more likely to get germs than paper towels
1. How to wash hands the cleanest: according to 1 no washing, 2 washing with water, 3 washing with soapy water, the three groups are the control group experiments, after washing the hands, use a soybean petri dish to cultivate the bacteria collected from the hands at a constant temperature
In the end, no bacteria can be cultivated after washing hands with soap and water. Only washing with water will not remove bacteria. If you don't wash your hands, there will be a lot of bacteria.
Proof that proper hand washing is indeed effective in destroying germs
2. Volunteers were called, and several people sprayed harmless E. coli on clean hands, and then air-dried
The samples of hands after drying were recorded as samples No. 1-1, and then directly after washing hands (without hand sanitizer), samples were taken as samples No. 1-2, and after wiping hands with paper towels, samples were taken as samples No. 1-3.
Repeated spraying with harmless E. coli, then let dry naturally
The samples of hands after drying are recorded as sample No. 2-1, and then directly sampled after washing hands (without hand sanitizer) as sample No. 2-2, and after drying hands in a dryer, samples are taken as sample No. 2-3.
[It is found that the common phenomenon of drying hands in the dryer is that the hands are left before they are completely dry]
Finally, the bacteria near the collected paper towels are recorded as samples 1-4 and the bacteria near the dryer are recorded as samples 2-4
Bacterial culture results are
Dryers only reduce hand germs by 23%, while paper towels reduce hand germs by 71%
More bacterial colonies near the dryer and less near the paper towels
The toilet cubicle closest to the door is the cleanest [true]
Find a public toilet with a decent flow of people, fully sanitize it, and install a counter on each compartment door, and return for sampling after a period of time.
result:
In terms of usage, the compartment closest to the door is used the least, and the compartments in the interval are used more than the edge compartments
In terms of the amount of bacteria, it also proves that the compartments near the door are used the least, and the compartments in the interval are used more than the edge compartments.
It is safest to hide near the door frame during an earthquake [inaccurate]
The early buildings were made of bricks without reinforcement . There were more reinforced beams in the corners, door frames, and window frames than on a single wall, so it was relatively safe, but long-term vibration would also damage the structure.
Modern buildings (United States) , because wood is cheap, generally wooden frames, good toughness, can absorb vibration, so the overall integration is stronger than brick houses, but indoor home decoration is still affected by vibration regardless of this. Supports (tables, under mattresses) prevent injuries from falling objects.
Most buildings in China are now made of concrete with steel reinforcement inside. It is recommended to hide in the triangle area near the load-bearing wall, or quickly leave the house and take refuge in an open space.
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