أكاديميا - كولنز - معاجم الجيب العلمية - الفيزياء - انكليزي - فرنسي - عربي الحرف ٩_ c

Academia - Collins - Pocket Scientific Dictionaries - Physics - English - French - Arabic Letter 9_ C


crystal
crystal m

Crystal. A uniform solid sample of a pure substance. The crystals of the material tend to take the same shape, and this affects the way the particles stick together within the sample and the growth of the crystal. The crystal structure gives additional evidence of the kinetic model of the material.
Liquid crystal - as used in many electronic display screens - is a liquid that behaves somewhat like a crystal. The way a sample reflects light is a property that is used to depend on the voltage across the sample, and the actual width. Namely, this is related to polarization.

A liquid crystal in a truly liquid state

Liquid crystal

A liquid crystal in a solid body


Curie temperature
Curie temperature

Curie temperature. The temperature above which a magnetic substance cannot be magnetized. The Curie temperature for pure iron is 770 degrees Celsius. Above this temperature, the energy of the particles becomes too great to hold together in domains.


Curies
Curies mpl

Corey family. A family of physicists who
With very early research on radioactivity. The most famous member is Mary (1867-1934), who died of cancer caused by radiation. Her discovery of radium was of great importance. Her husband, Pierre, and her daughter, Irene, have done very useful work in the field of physics.

The family name was immortalized by naming the radiation unit: the Korean. Curium, an element that emits an alpha particle, is widely used in power sources. See also Curie temperature, which is a nominal term named after Pierre, who was the first to work in this field.


current ( I )
courant m

Stream . Charge flow.
See conduction electrical, and the unit of current is the ampere A. One ampere is a coulon per second: I = Ot. See also Ohm's law.

The currents passing through circuits form the basis of many electrical machines and electronic systems.
Charge and energy transfer effects are used in all cases. The transfer of energy can produce light, temperature changes, magnetic effects, chemical changes, and force.


current balance
balance of the currency

Current balance: A device used to measure current, and its user must balance the magnetic force between the coils with the weight on the cuff.

The ampere, the unit of current, is conventionally determined by the force existing between the current-carrying wires. Therefore, such a meter can measure current “absolutely”.


cycle
cycle f

turn . A series of repeated single changes in a wave, vibration, or rotation, for example. At the end of the cycle, the system has returned to its starting point. See hertz.

Simple periodic changes can be drawn as sine waves, and one period is a sine wave of a single 360-degree circle.