Physical phenomena, what are the physical phenomena

What a physical phenomenon.

Thunder. Triboelectric generation.

Electrostatic shielding. Refraction reflection of light.

What we mortals see and what we see and see with instruments are physical phenomena.

The physical phenomena are:

1. Optical phenomena: such as light bulbs, reflective glass windows, mirrors, luminous cups, luminous shoes, fireflies, etc.

2. Electrical phenomena: such as air conditioners, televisions, hair dryers, lightning rods, etc.

3. Mechanical phenomena: such as thermal expansion and contraction, tricycle pulling, water pumping at the bottom of the well, etc.

4. Thermal phenomena: such as greenhouse vegetables, solar cookers, drying clothes, melting of ice, vaporization of water, etc.

5. Magnetic phenomena: such as TV antennas, radios, satellite receivers, etc.

6. Acoustic phenomena: such as piano playing, flute playing, birdsong and dog barking, horn broadcasting, etc.

Physical phenomena refer to the change of the form, size, structure, and properties (such as height, velocity, temperature, and electromagnetic properties) of matter without the formation of new matter. In other words, physical phenomena refer to physical events or physical processes that can be directly perceived, and are different from physical essences, which are abstractions of the common essential properties of similar physical phenomena.

List:

1. Thin pieces of paper falling from a high place, even if there is no wind, the route of the paper falling is tortuous and changeable.

This is due to the different convex and concave parts of the paper piece, the shape is different, so in the process of falling, the air flow velocity of various places on its surface is different, according to the principle of fluid mechanics, the flow rate is large, the pressure is small, resulting in the uneven air force everywhere on the paper, and changes with the change of the movement of the paper, so the paper continues to roll, zigzag and fall.

2. Frozen meat thaws faster in water than in air at the same temperature. Something that burns hot cools down faster in water than in air at the same temperature.

A cup filled with piping hot boiling water cools down faster when immersed in water than in air at the same temperature. The reason is that the specific heat capacity of water is larger than that of air, and the heat that can be transferred to the meat by the water drop is much higher than that of the air when the water is in contact with the same contact area.

3. Sprinkle some salt on the snowy road surface quickly, these phenomena all show that salt is used as a snow melting agent.

4. When thunder, you see lightning first, and then hear thunder, these phenomena show that light spreads faster than sound!

Therefore, it cannot conduct the charge generated by friction, and if the charge accumulates, it is easy to produce discharge, which will cause gasoline combustion and dangerous accidents.

Examples of physical phenomena in life are as follows:1. Rice cooker cooking, electric wok cooking, and electric kettle boiling water convert electrical energy into internal energy.

2. The exhaust fan (range hood) converts electrical energy into mechanical energy, and uses air convection to convert air.

3. The three-pin plug of the rice cooker, electric wok, and electric kettle should be inserted into the three-hole socket to prevent the occurrence of electrical leakage and electric shock accidents.

4. The microwave oven heats evenly, with high thermal efficiency, hygienic and pollution-free. The heating principle is to use electrical energy to convert electromagnetic energy, and then convert electromagnetic energy into internal energy.

5. The electric lamp in the kitchen uses the thermal effect of electric current to work and convert electrical energy into internal energy and light energy.

6. The kitchen stove (honeycomb coal stove, liquefied gas stove, coal stove, wood stove) converts chemical energy into internal energy, that is, fuel combustion releases heat.

What is antiphysics? Look at.

As the name suggests, it is the opposite of physics. However, it is not to subvert modern physics, but to explore another side of physics.

This so-called anti-physical phenomenon is relative, such as liquid water, we all know that thermal expansion and contraction are general physical phenomena, but liquid water of the same mass is densest at 4 degrees Celsius! Wait, wait, there's more!

In the development of physics, there are many times when thinking in terms of opposites, such as protons and antiprotons, electrons and positrons, energy and dark energy, and so on.

Physical phenomena refer to the change of the form, size, structure, and properties (such as height, velocity, temperature, and electromagnetic properties) of matter without the formation of new matter.