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Anonymous users2024-02-10Haven't these ideas been solved by others? The mountain road is difficult to walk and install street lights, and I haven't found any better way yet, except to bring something that can emit light, luminous materials. But ** expensive can not be popularized.
There are so many factors for car accidents to happen, and scientists have long figured it out, but there are too many human factors, so it still happens from time to time.
Now that the roads have been repaired, if they are frozen, they will use snow melting agent, and there is no need for any new materials.
In fact, you can study the things around you, such as what everyone talks about gas poisoning, many people think that carbon monoxide is sucked in too much, but when you take a bath for too long, people will also get dizzy, (put a candle in a place where the water can't shower, close the door, and the room may be extinguished in less than 1 hour) That is also gas poisoning, but it is caused by a lack of oxygen, and a student won the Innovation Discovery Award for middle school students for discovering this reason!
Think about other things in life that can be improved, such as umbrellas, raincoats, etc.
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Anonymous users2024-02-09Change the glass of the car to a polarizer, and then the light emitted by your own car is also a polarizer in the same direction, such as a unified standard, everyone "This is biased, so that the light of your car hits other objects and reflects back to you can see, and you can see the object illuminated by your own car at night, but the light from the headlights of the oncoming car cannot shine into the glass of your car, because the polarization direction of the light is opposite to the direction that the glass is allowed to pass, This reduces the number of crashes caused by being blinded by oncoming cars. Believe me, I've seen a physics competition and won the second prize, this solution is not my own idea, but I can't remember which book I read it from, and I am sure it hasn't been applied yet, so it's a good idea. Since it's your own competition, it's useless to say in detail, you need to find your own information to understand the problems in order to become your own, I just gave a hint, I suggest you can take a look at the books of optics, you can understand it after reading high school textbooks, come on!
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Anonymous users2024-02-082 A concave lens can be attached to the bend
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Anonymous users2024-02-071.Roughens the pavement and increases the diffuse reflection of the pavement.
2. Lighten the weight of the car to reduce its kinetic energy, and use elastic materials to make the body to cushion the energy during the collision.
3. With a material like a wire mesh, the rainwater can be filtered.
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Anonymous users2024-02-06Car accidents often occur, can increase the roughness of the tire, increase the friction, so that the car will not slide too far after sudden braking, add an anti-lock braking system on the car, can change the sliding friction into rolling friction, increase the control of the car.
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Anonymous users2024-02-051.Electric rods. 2.Safety belt.
3.Asphalt road.
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Anonymous users2024-02-04Automatic bottle caps.
When my mother cooks vegetables, she always has to use two hands to pour oil and soy sauce. It is inconvenient to hold the bottle in one hand and remove the cap with the other.
I designed automatic bottle caps that can be made with a piece of iron, a piece of lead wire and a nut. Pouring the oil bottle, gravity makes the nut sag, and automatically pulls the cap open; The oil bottle stands upright, gravity resets the nut, and the cap is automatically closed. In this way, you can free up one hand to hold the spoon and no longer have to rush around.
Just loosen the lead wire holder, remove the automatic cap, and replace it with a stopper, and you can go to the store to buy oil.
That's how to make it, remember to give me points!
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Anonymous users2024-02-031. For the current direction flowing on the resistor r, the direction is from right to left, and the voltage polarity at both ends of the resistor: right positive and left negative.
It is clockwise for the entire closed loop.
2. The direction of movement of the electrons is exactly the opposite direction of the current flowing over the resistor r1, from left to right, which is counterclockwise for the entire closed loop.
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Anonymous users2024-02-02The direction of the current is from the right side of r to the left side.
2 The direction of movement is from the left side of r to the right side.
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Anonymous users2024-02-01The direction of the current is clockwise. The direction of electron flow is counterclockwise.
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Anonymous users2024-01-31The current direction is clockwise, and the direction of electronic motion is from the negative to the positive outside the power supply.
I found the key to "unraveling the puzzle".
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You're enlightened. The premise and foundation of life is to be alive. Without being alive, everything is in vain, there is no hope. There is no happiness, no success, no affection, no experience.