1. Electric shock danger: various electrical equipment, such as power supply, wires and switches, are often used in physical experiments. If these devices or lines fail or operate improperly, it may lead to electric shock, personal injury or equipment damage.
2. Radiation hazards: radioactive substances or strong electromagnetic radiation, such as X-rays and γ-rays, are often involved in physical experiments, which have a certain impact on human health. Long-term contact or improper operation may cause radiation damage.
3. Explosion danger: Flammable and explosive substances, such as hydrogen and acetylene, are sometimes used in physical experiments. Improper operation or equipment failure may cause explosion accident, causing personal injury or equipment damage.
4. Danger of burns: Sometimes high-temperature objects or liquids, such as flame and molten metal, need to be used in physical experiments. Improper operation or inadequate protective measures may cause scalding accidents and personal injuries.
5. Mechanical hazards: various mechanical equipment and tools, such as levers, pulleys, hammers, etc. , often used in physical experiments. Improper operation or equipment failure may lead to mechanical injury accidents, resulting in personal injury or equipment damage.
6. Chemical hazards: various chemical reagents, such as acid and alkali, organic solvents, etc. Physics experiments are sometimes needed. These reagents have a certain impact on human health, and long-term contact or improper operation may cause chemical damage.
Matters needing attention in physical experiment:
1, Preparation before the experiment: Before the experiment, check and prepare the instruments, equipment and equipment needed for the experiment to ensure that they are intact and meet the experimental requirements. It is also necessary to know and master the experimental steps and operation methods in detail to avoid accidents or mistakes caused by improper operation.
2. Experimental operation specifications: In the experiment, we should strictly abide by the experimental operation specifications and operate according to the prescribed steps and methods. It is necessary to observe the experimental phenomena and data changes, and record and analyze the experimental results in time. If you encounter any abnormal situation or problems, you should stop the experiment immediately and report to the instructor or laboratory manager.
3. Laboratory safety and hygiene: In the experiment, we need to pay attention to the safety and hygiene of the laboratory. Avoid smoking, eating, drinking and other behaviors that do not meet the requirements of the laboratory. It is also necessary to keep the laboratory clean and hygienic, clean up the experimental equipment and waste in time, and maintain a good experimental environment.
4. Experimental data processing: After the experiment, it is necessary to process and analyze the experimental data. Attention should be paid to the accuracy and reliability of data to avoid errors or misunderstandings caused by improper data processing. It is also necessary to analyze and summarize the experimental results and draw correct conclusions and suggestions.