B3

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  • Brand: 4M
  • Brand: NGS
  • Age: 12 ετών & πάνω

€9.00

In fact, the laser is not a mystery, its simplest principle is the reception of light from a mirror on both sides of the resonance cavity, with the reflection beam back and forth, the light in the resonance cavity is amplified, the wavelength has become uniform, and finally out of a small hole, is our everyday laser.

€6.00

The motor rotates at a high speed, driving the fan to exhaust air from the bottle mouth to the outside of the bottle, so that negative pressure is formed in the bottle, and finally suction is produced at the bottle mouth, and the paper debris is sucked into the bottle . The bottle cap can be closed at normal times, but can be rotated downwards during use.

€7.00

The main use of salt water conductive principle. The zinc is more active than cooper,so the zinc is easy to lose electron and come to the positive pole. The cooper come to the negative pole.The salt water is act as the role of electrolyte. The electrolyte is a material that can conduct electricity. The salt water will be activated when mixed acetic acid....

€15.00

Discover the journey that food makes through the human system and learn about the functions of the digestive system. Will you be able to complete the course with the stick without hitting the buzzer? Read the entertaining facts included in the instructions and learn interesting information about the organs of the digestive system. CONTENTS: Part 1: Base...