أكاديميا - كولنز - معاجم الجيب العلمية - الفيزياء - انكليزي - فرنسي - عربي الحرف ٨_ c

Academia - Collins - Pocket Scientific Dictionaries - Physics - English - French - Arabic Letter 8_ C


converging
convergent

Close. See mirror and lens.


cooling curve
courbe f de refroidissement

Cooling curve. This term refers to the graph obtained from temperatures taken as a substance cools over time. This curve is particularly useful in finding the melting point of a liquid, which is the same as its solidification temperature. Cetyl alcohol is considered a safe substance to use in this experiment. See latent heat. This curve has another benefit in finding heat or heat losses resulting from cooling.


coplanar
coplanaire

Uniform level. At the same level.


cosmic radiation
radiation f cosmetic

Cosmic radiation. Very high energy particles coming from space, their actual source is uncertain, and may be stars that erupt like novae or explode like supernovae.

Cosmic particles are nuclei of light atoms that reach the Earth from all directions at speeds close to the speed of light. When a particle like this collides with another in the air, a shower is emitted, as shown in the figure below. When this barrage reaches the surface of the Earth, it can cover hundreds of square kilometers.
See background radiation.


coulomb
coulomb m

Colon. Unit of electric charge.


counter
compteur

Counter . An electronic circuit capable of counting current pulses, even if they are at high rates, and a Geiger-Müller tube is one of the sources of these pulses. It may also operate a loudspeaker. Compare with scaler.
The number of pulses counted in a unit of time (seconds or minutes) is called the count rate.


couple
couple m

Dual . Two pairs of equal and opposite parallel forces work to rotate the body. The torque (effect of rotation) on the body is the result of multiplying one of the two forces by the distance between them.

F2s or T = Fis


critical angle
angle m critique

Critical angle.
See total internal reflection.


critical temperature
température f critique

Critical temperature. The temperature above which a gas cannot be compressed to turn it into a liquid. See vapor. The critical temperature of water is 374°.


CRO

Cathode ray vibration detector. Abbreviated as cathode ray oscilloscope, it is a special type of cathode ray tube that accepts an input voltage of alternating or direct current and can be used in many tasks by giving a graphical display of the value. The detector is a multi-use and extremely valuable laboratory tool, although in reality it is only a voltmeter. It can be used to measure voltage, time, frequency, and examine alternating current inputs, sound signals, and waveforms.