1. Used as a funnel. Cut the bottle in the middle and the top part will become a funnel. If the neck of the bottle is too big, you can roast it over a fire and then pinch it to make it a smaller size.
2. Use the concave and convex bottom of the bottle to make a spoon to take dry ingredients.
3. Mineral water bottles can be used to plant flowers and plants. Fill the mineral water bottle with soil and plant some small flowers and herbs, environmentally friendly and beautiful.
4. Mineral water bottles can be sold at recovery stations. You can collect a large number of empty mineral water bottles up to a certain quantity and sell them at the scrap station, which not only protects the environment but also makes money. It's a good way to be frugal and manage a household.
Detailed information:
Notes:
1. PET #1: Commonly used beverage and mineral water bottles will release a carcinogen after 10 months of use. , the release rate is faster at high temperatures. Therefore, do not use it repeatedly and cannot contain high temperature liquids.
2. HDPE #2: Commonly used in medicine bottles and cleaning products. It has low surface hardness and is prone to aging and deformation. If it is reused, it must be cleaned thoroughly, otherwise bacteria will multiply easily.
3. #3 PVC: Commonly used in plastic bags and raincoats, which produce toxic substances when exposed to high temperatures. Do not pack high temperature foods, such as sticksfried dough ets.
No. 4 and 5 PP: Commonly used water cups, relatively safe, but be careful with dyes, it is better to choose colorless ones.
Baidu Encyclopedia - Plastic Bottle
Holding the bottle by hand releases heat and converts internal energy into mechanical energy
Handmade Coke Bottle
p>Making materials: Large Coke bottle, soil, cotton thread
The first step is to cut the bottle in half. You can do this with a knife. Then use a nail and a hammer to punch a hole in the bottle cap.
The second step is to knot the rope and pass it through the bottle cap. The length of the rope can be adjusted by yourself.
The third step is to screw the bottle cap back on. Attach the two parts of the bottle like this.
The fourth step is to fill it with water and soil. LThe water is in the bottom half of the bottle and the soil is in the top half of the bottle. Moisture is automatically transferred to the ground thanks to the cotton rope. When the soil absorbs enough nutrients, it will naturally stop receiving moisture from the cotton rope.
If you want to make it more beautiful, you can paint the outside of the bottle or wrap hemp rope around it. After a while the water becomes cloudy, and you can also remove the bottom part to make it look better. change the water.
Analysis In cold weather, if you rub your hands quickly and your hands are hot, this is a phenomenon of heat generation by friction, and mechanical energy is converted into internal energy. The water turbine drives the generator to produce electricity, which is a mechanical energy transfer process. Putting a block of red-hot iron in water makes the eto cold hot, which is a process of internal energy transfer. Iron releases heat, internal energy decreases and water absorbs heat. Internal energy increases. We see that options A, B and C do not belong to the conversion of internal energy into mechanical energy. When the water in the pan boils, the lid continues to beat. The expansion of water vapor works outward, its own internal energy decreases, thus obtaining mechanical energy, which is the conversion of internal energy into mechanical energy. . The answer is D. Comments For energy conversion, we need to analyze the energy form before and after the object, as well as the energy form in the specific process, so that we can correctly know how the energy is converted.