What are some examples of clever use of physics in your life experiences?

When the pot contains cold water, the water droplets attached to the outer surface of the bottom of the pot can be boiled dry on the flame for a long time, and do not boil until it is boiled dry, this is because the water droplets, the pot and the water in the pot maintain heat conduction, and the temperature is about the same, as long as the water in the pot is not boiling, the water droplets will not boil, and the water droplets are gradually boiled dry by evaporation on the flame.

Thin pieces of paper falling from a high place, even if there is no wind, the path of the paper falling is tortuous and changeable. This is due to the different convex and concave parts of the paper, the shape is different, so in the falling process, the airflow 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.

Frozen pork thaws faster in water than in air at the same temperature. Scalding nails cool down faster in water than in air of 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.

All these phenomena show that water has better heat transfer than air.

When taking pictures of the TV screen, the camera flash and indoor lighting should be turned off, so that the ** picture is clearer. Because the reflected light from the flash and lighting on the TV screen can interfere with the transmitted light of the TV picture.

There are several small holes on the side of the nozzle of the natural gas furnace that communicate with the outside world, but the natural gas does not eject from the side holes, only from the nozzleThis is due to the large gas velocity of the natural gas at the nozzle, according to the principle of fluid mechanics, the flow velocity is large, the pressure is small, and the surface pressure of the air flow is less than the atmospheric pressure outside the side hole, so the natural gas will not be ejected through the small hole on the side of the nozzle.

The rearview mirror on the side of the cab of the car is a convex mirror. The divergence effect of the convex mirror on the light and the characteristics of upright, shrinking and virtual image are used to make the image seen smaller than the real thing, and increase the driver's observation range behind the car, so as to ensure driving safety.

Induction cooker can convert electrical energy into electromagnetic energy, electromagnetic energy into electrical energy, and electrical energy into heat energy. It has no radiation effect on the human body. It is very thermally efficient and saves electrical energy. It is a typical application of electromagnetism and magnetism in life.

When the ceiling fan rotates normally, the tension at the suspension point is smaller than that when it is not rotated, and the greater the speed, the more the tension decreases. This is because the air has an upward reaction force on the ceiling fan blades when the ceiling fan is turning. The higher the rotational speed, the greater this reaction force.

Sometimes there is an occasional sound when the water pipe discharges water from a nearby tap. This is due to the resonance of the water pipes caused by the water flushing out of the faucet.

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. Exhaust fan.

Range hood) converts electrical energy into mechanical energy.

Air conversion using air convection.

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. Kitchen stove (honeycomb coal.

stoves, liquefied gas stoves, coal stoves, wood stoves) is the chemical energy.

Converted into internal energy, i.e. the heat emitted by fuel combustion.

(1) Wearing glasses, from the cold outdoor to the warm indoor, the glasses will be covered with white mist, which is the liquefaction of gas.

2) When the water boils, the lid will be lifted up, and it is the gas that does the work on the lid.

3) Sitting in a fast-moving car, when turning, you will feel thrown outward, which is a centrifugal phenomenon.

4) The corners of the wall of the long-term coal pile will be blackened, which is the diffusion phenomenon of solid molecules.

5) Drilling wood can make fire, which is to do work to change internal energy.

6) Leaning next to the heater will make you feel warm, which is heat transfer.

7) Nail clippers, scissors, tweezers work on the principle of levers.

8) Riding on a pirate ship, there is a phenomenon of weightlessness.

9) The incandescent lamp is permanent, and there will be a layer of black on the wall of the bulb, which is the sublimation of tungsten filament.

1) In the summer, the water vapor from the bottle of Minying beer from the refrigerator is "sweaty", and when it is cold, it liquefies into small droplets and adheres to the bottle.

2) Tongshou winter window bridge wheel cluster on the ice flowers: water vapor condensation.