Materials required: cardboard, aluminum foil, wood shavings or strips, scissors, handsaw, white glue, glass tube or clear plastic tube
Steps:
1, First make a support with wood chips, as shown below.
2. Then fold the cardboard and stick it to the backing with white glue as shown in the picture below.
3. Use white glue to glue the foil to the cardboard as shown below.
4. Adjust the angle of the cardboard and foil to form a concave arc, as shown below.
5. Cut two pieces of wood the same length as the glass tube to make a support. Stick it in the middle of the backing as shown below.
6. Install a post that can adjust the angle of the concave arc behind the bracket and the cardboard. Fill the glass tube with water, place it on the bracket and adjust the angle of the concave arc ofso that the glass tube is right at the focus of the reflector reflecting the sunlight, as shown in the image below.
How to make a small fountain with science
It is difficult and uneconomical to make a small hydroelectric generator yourself.
To obtain high efficiency from a small 1000W hydroelectric generator, an impact hydroelectric generator set can be selected.
The impulse hydraulic generator set is also called horizontal hydraulic generator set. Like the oblique impact hydraulic generator, it is a hydraulic generator with high water head and low flow. The required water height range is: 7-40. meters. It is suitable for use in high mountain areas. Its working principle is as follows: in the hydraulic turbine, the jet coming out of the nozzle is not in the tangent directionlle, but in the direction forming a certain angle with the plane of rotation of the It enters the bucket through one side of the slide, then exits through the leaf of the bucket through the other side. The main features of the impact hydroelectric generator set are:
1. Under normal water conditions, water resources can be reasonably used to generate electricity.
2. If there is a rainy and dry period and there is no water, the diesel engine can be used to generate electricity.
For a small hydroelectric generator of about 1 kW, the market price is about 1,000 yuan. It is much cheaper and faster to buy it directly than to make your own.
For small hydroelectric generators of around 1 kW, the most important thing to consider is its operational stability and reliability. It is recommended not to think too much about efficiency. After all, for a unit ofa power of 1 kW, the difference between the power of 70% and 60% is 100 W. There is no need to invest more for 100 W.
Steps to make a small fountain are as follows:
1. Used mineral water bottles Materials for small fountain: 1. Used mineral water bottles, modeling clay, straws (long curved, short and straight), appropriate amount of water. Production steps:
1. Transfer the water into the mineral water bottle (the height of the water may touch the short straw).
2. Knead the modeling clay until it is the same size as the neck of a bottle of mineral water.
3. Insert the long and short straws into the pinched playdough.
4. Press the plasticine with a straw onto the neck of the mineral water bottle. Blow into the mineral water bottle through a long straw and the water in the bottle will pass through. Come out preciselypitifully from the short tube.
2. Use disposable plastic cups to make a small fountain. Use two disposable plastic cups, tape them together with clear tape, cut the bottom of the cup, then pierce the body of the cup. a ring of small holes, pour water into it and place a small flashlight on the mouth of the cup, and a small dynamic fountain is created