7 super interesting scientific knowledge that we missed while at school

Time for school is limited, so there will be knowledge, scientific information must be ignored. This article will mention such things.

Remind many but still have to repeat, it is the knowledge of humanity is endless. Over time, that endless treasure continues to be open, including extremely interesting knowledge but very few people can grasp it.

That's right, science is dry.

1. Water can boil and freeze at the same time

Water is known to everyone, exists in 3 forms: solid, liquid, gas. However, there is a point where water can both boil and freeze at the same time. That's when the water reaches the fork of the liquid - triple point.

Triple point is a time when water can boil and freeze at the same time.

Then, the temperature and pressure of the water are sufficient for all three types of water to coexist in thermodynamic conditions.

Specifically for water, the necessary conditions are temperature reaching 0.01 ° C and pressure of 0.00603659 atm. At this time when the water boils, the water vapor will carry energy, lowering the energy of the remaining water to freeze it. This process will be repeated, while the overall temperature and pressure remain the same.

2. We can create "laser waterfall"

The reason for this phenomenon is due to the bending of water.

Light always goes in a straight line. However, the reason we can do this is because of an interesting physical phenomenon: total reflex.

This phenomenon occurs when light enters the interface between two environments at a different angle - this is because the water jet is bent - it will be refracted, rather than continuing straight. And because this process is continuous, the entire ray of light will be bent according to the water jet.

3. You do not understand how fast the spaceship is

Compare the speed of the New Horizons spacecraft (58,000 km / h) and the SR-71 Blackbird (the fastest aircraft available today, reaching a speed of 4,345 km / h).

Space rockets are of course fast. However, the feeling of losing nearly a year to Mars, or a few dozen, several hundred years to reach the planets outside the solar system, is easy for many people to think that rockets . fly like turtles.

However, we have forgotten that the universe is really vast. Therefore, in order to achieve the 8-month period, the spacecraft must have tremendous speed.

4. What happens when cosmic black holes swallow a star?

The cosmic black hole is one of the most mysterious spaces in the universe, with extremely strong gravity, enough to attract anything, including light.

The star moving near the black hole was immediately sucked in.

But this does not mean being sucked in will sink in a dark area. When a black hole sucks a star, the energy source is too big to make it . unruly - spewing out a plasma pillar that spans hundreds of light years.

5. The strength of explosions on the Sun.

The sun is a mass of energy that is not calm, because it . explodes all day.

And you know, every explosion in the Sun releases an energy block equivalent to . 100 million 100 megaton atomic bombs (1 megaton = 1 million tons of TNT explosives). To better visualize, the American Fat Man bomb dropped in Japan in 1945 only about 21 kiloton (equivalent to 21,000 tons of TNT).

6. "Life-hack" helps you see when you forget your glasses

The body is the person who is approached, the glass must be a separate object, because if one day unfortunately "separated" - that day was a disaster. The eyes of the nose were narrowed to miserable but still could not see.

However, there is a little trick to help the close-up team more or less see what to look at. It is looking through a small hole like the following picture.

Limiting the viewing angle will help you see better.

Limiting the angle of view will help us focus light on the retina, through which the image will become more pronounced.

7. You will die faster if you catch an underwater grenade

Shock waves spread underwater, causing your lungs to collapse.

This is true, because what happens to the balloons in the image above is exactly what happens to your lungs.

Shock waves from the explosion will spread through the water, causing your lungs to collapse, even puncture the lungs.