"hole" newsreels and historical clips

... eliminating holes on the ship.

Various methods of sealing holes are being worked out.

Sealing the hole with a hard plaster and a wooden beam.

The beam should be installed perpendicular to the patch.

The preliminary split should not be too weak, then after precipitation the patch will not slip off the hole.

When ...

... working with a sliding metal stop, it is important to choose its initial length correctly.

If it is insufficient, you need to transfer the stud to another hole and squeeze the patch by rotating the pressure nut of the threaded connector.

The angle profile clamp is more compact and convenient to use.

First of ...

... that its center is located strictly opposite the clamping screw of the clamp.

If the hole has the edges bent inwards, a hook bolt with a crossbar and a box patch are used.

The bolt with the crossbar is wound into the hole, while it is important that the crossbar is securely pressed against the side from ...

... nut.

Small holes can be sealed with wooden stoppers.

When sealing large holes in the hull and bottom of the vessel, various types of plasters are used.

The loaded and straightened patch falls overboard.

At the same time, it should be remembered that even if the patch completely hits the hole, water filtration ...

... telescopes are synchronized by ultra-precise atomic clocks, earthlings for the first time saw an image of the most mysterious space object: a black hole.

Scientists did not doubt its existence, but they saw it for the first time.

A dark circle with an orange halo was named after the Powehi, which means ...

... AN Kotlyarov participants relay.

A. Kotlyarov, bathed in the hole.

"Walrus" basking in the hole, wipe off the snow man.

The teacher tells the children about tempering (synchronously).

Pupils go barefoot in the snow.

A boy dives into a hole.

AN Kotlyarov are typing at the dictation of her husband.

A. ...

People around the hole.

People are clearing up the stairs.

A woman bathes in the hole, out of the water.

A man goes down and floats in the hole.

Bathing girl.

Women with children at the hole.

Bathed the boy.

Children.

Bathing woman.

A pregnant woman is bathed in the hole.

Crows in the snow.

Interview ...

... Interview with women in "winter swimming".

Infant dipped into the hole.

Recently, the work "Is there life inside black holes?" was published on the website of the scientific library of Cornell University, one of the leading scientific centers in the USA. Its author, Vyacheslav Ivanovich Dokuchaev, a leading researcher at the Institute for Nuclear Research of the Russian ...

... of Sciences, states: stable orbits exist not only outside black holes, but also inside their gravitational field, and spacecraft or even planets of a highly developed civilization can be in orbits around a black hole.

What are black holes, how are they studied and are they dangerous for humanity?

People bathe in the hole.

People rubbing each other's snow.

People sit at the hole and read newspapers.

Man lying in the snow.

... conduction band.

In this case, a free state or a hole is formed in the valence band.

Schematic representation of such an electron transition.

The hole behaves like a positively charged particle.

When an external electric field is applied, free electrons and holes move in opposite directions.

The crystal becomes ...

... are called donor or N-type.

Other impurities create permitted levels near the valence band.

Electrons from the valence band move to these levels, and holes form in the zone.

The impurity ion in this case turns out to be negative.

Such impurities are called acceptor or P-type.

The electrical properties of ...

... regions with various types of impurities are formed.

At the point of contact of the regions with donor and acceptor impurities, free electrons and holes diffuse towards each other.

As a result of recombination, a potential barrier appears in the region of the PH transition.

Before us is a kind of electric ...