X-zraci, rendgenski zraci

X-zraci, rendgenski zraci

A very high energy form of electromagnetic radiation (though not as high energy as gamma rays ). X-rays typically have wavelengths from a few picometers up to 20 nanometers. X-rays easily penetrate soft tissue, which makes them useful in medical imaging and in radiation therapy.

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x-zraci

Astronomie; Marte

Very short wavelength radiations beyond the ultraviolet in the spectrum, which are about one ten-thousandth as long as the visible violet and are extremely penetrating.

x-zraci

Istoria artelor; Arte vizuale

A photograph using an x-ray. X-ray images have been used to identify what lies under the surface of a painting, including prior works or studies and sketches.

gama zraci

Chimie; Chimie în general

A very high energy form of electromagnetic radiation , typically with wavelengths of less than 3 pm. Gamma rays are produced by certain nuclear decay processes, and are used to ...

kosmički zraci

Astronomie; Ştiinţa planetelor

Extremely high-energy subatomic particles that continuously bombard Earth from all directions. Most cosmic rays hit and break up atomic nuclei in Earth's upper atmosphere. Airless ...

katodni zraci

Fizică; Fizică în general

Negatively charged particles (electrons) that are emitted from a negative terminal in an evacuated glass tube.

isparljiv

Chimie; Chimie în general

A solid or liquid material that easily vaporizes. A material with a significant vapor pressure .

abraziv

Chimie; Chimie în general

A very hard, brittle, heat-resistant substance that is used to grind the edges or rough surfaces of an object. boron carbide, diamond, and corundum are abrasives.

diastereoizomer, diastereomer

Chimie; Chimie în general

Stereoisomers which are not mirror images of each other. Diastereomers are chemically similar but distinguishable; they have different melting points and boiling points and they ...

medicinska hemija

Chimie; Chimie în general

A branch of chemistry concerned with the discovery, design, synthesis , and investigation of biologically active compounds and reactions that these compounds undergo in living ...

slab elektrolit

Chimie; Chimie în general

A weak electrolyte is a solute that incompletely dissociates into ions in solution. For example, acetic acid partially dissociates into acetate ions and hydrogen ions, so that ...

grafit

Chimie; Chimie în general

An amorphous form of carbon , made of carbon atoms bound hexagonally in sheets (like chickenwire).

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Tereza Skanlan

The winner of the 2011 Miss America pageant. Scanlan, A 17-year-old and recent high school graduate from the western Nebraska town of Gering captured ...