Scientific phenomena in life What are the scientific phenomena in life?

1. The quartz clock hanging on the wall wall often stops at the position of "9" on the dial when the battery is exhausted and stops moving. This is due to the fact that the second hand is most hindered by the gravitational moment at the "9" position.

2. Sometimes when the water pipe discharges water from the adjacent faucet, there is an occasional burst of noise. This is due to the resonance of the water pipes caused by the water flushing out of the faucet.

3. 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

4. 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.

These phenomena all show that the heat transfer of water is better than that of air, 5. When the pot is filled with cold water, the water droplets attached to the outer surface of the bottom of the pot can be burned dry on the flame for a long time, and it does not boil until it is boiled dry, which is due to the fact that 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 burned dry by evaporation on the flame, 6. The distorted mirror, the farther away from the mirror, the more out of shape Because the image in the mirror is formed by the reflection of the silver-plated surface behind the mirror, Uneven silver plating or uneven glass thickness can cause distortion. The farther away from the mirror, the greater the deviation from the normal position of the reflected light on the silver-plated surface by the principle of light amplification, and the more out of shape the mirror is

7. 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 will not be sprayed out from the side holes, only from the nozzle. This 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.

8. After blowing the balloon bigger, pinch the mouthpiece with your hand, and then suddenly let go, the air flow in the balloon sprays out, and the balloon moves due to recoil. You can see the twists and turns of the balloon's movement. There are two reasons for this:

First, the thickness and tension of the balloon are uneven, so that when the balloon is deflated, it shrinks unevenly and swings, so that the direction of movement changes constantly; The second is that the shape of the balloon is constantly changing in the process of contraction, so the airflow velocity at the surface of the balloon is also constantly changing during the movement, according to the principle of fluid mechanics, the flow velocity is large, the pressure is small, so the pressure of the air on the surface of the balloon is also constantly changing, and the balloon swings because of this, so that the direction of motion is constantly changing.

9. The tensile force of the suspension point of the ceiling fan is smaller than that when it is not rotated when it rotates normally, and the greater the rotation speed, the more the tensile force decreases This is because the air has an upward reaction force on the ceiling fan blades when the ceiling fan rotates The greater the rotation speed, the greater the reaction force

10. The "combustion" of the electric furnace is the conversion of electrical energy into internal energy, which does not require oxygen, and oxygen can only oxidize the electric furnace wire and shorten its service life. Reference.

Day and night: The rotation of the Earth.

Changing Seasons: The Earth Revolutions.

Polar day and night, latitude causes and the rotation of the earth

The deflection of the estuarine delta is caused by the eccentric force of the Earth's rotation!

Well, it's a little bit.

Let's sit down and have a good time.

Scientific phenomena in life:1. Gravitational force: objects falling, airplanes fly high and cannot exceed the gravitational range of the earth, human heart disease, stomach prolapse, hemorrhoids are all related to gravity, water in rivers flows low, climbing mountains and stairs feel very tired, friction, tidal phenomena, the atmosphere does not run away, piling machines at construction sites, rain and snow falling on the ground, compasses, planets in the solar system revolve around the sun, black holes, table tennis, diving, shot put, migration of migratory birds, and pigeons discerning directions.

2. The difference between the time between the sun rising in the east and setting in the west every day between the earth and China and the United States.

3. Refraction of light: the chopsticks in the water are broken, the stones in the water feel shallower, the mirage, the cat's eye on the door looks at the people outside, and the object is seen through the magnifying glass and glasses.

Ten scientific phenomena in life:

1. A person who eats meat eats an average of 7,000 animals in his lifetime, and every unborn baby grows a beard in the womb.

2. The average life expectancy of joggers is six years longer, and sleeping less than 7 hours a night will reduce your life expectancy. Fingerprints begin to be produced when the fetus is eight weeks old.

3. You used to be a very small egg, probably only. Over the course of a lifetime, your brain's long-term memory can hold up to 1 gigabit (1 million) individual bits of information.

5. Women live longer than men, in part because their immune systems age more slowly. Women spend more than 4 years of their life in menstrual periods.

6. If everyone in the world could wash their hands properly, a million lives could be saved in a year. People who have many friends live longer than those who are isolated.

7. A woman spends almost a year in her life deciding what to wear, and the probability of living to be 110 years old or older is about 1 in 7 million.

of Americans believe in some kind of afterlife, and for every cigarette smoked, your life expectancy is reduced by 11 minutes. In the United States, a person eats an average of 35 tons of food in their lifetime.

9. No one knows exactly why humans produce tears of laughter, joy, and sorrow. There are many different types of tears, but emotional tearing is considered unique to humans.

10. Most people can survive for 2 months without eating, and people can only live up to 11 days without sleeping. One survey found that men spend almost a year in their lives staring at women.