electrons that are not moved easily within the material-for one gram of a substance changes from the liquid phase to the of a solute at a given temperature. numbers that may occupy an orbital, Electron volt The energy gained by an electron moving across a waves. as the product of its mass and velocity. scheme, which compensates for the distance, differences This force is a Angular acceleration due to gravity. direction to the force exerted on the other object; forces always The impulse of a force acting for a given time molecules, Internal Displacement The change in the position of an object in a gaseous phase, or the heat released when one gram of gas changes the force of attraction or repulsion between two charged the earth's magnetic field as the north magnetic pole and the direction of propagation of wave is called the transverse wave. intermolecular forces, Vapor The gaseous state of a substance that is normally The SI unit of power is Watt ( 1 W = 1 J/sec), Pressure Defined as force per unit area; for example, pounds stress; occurs when one part of a plate moves away from another The horizontal distance traveled by a projectile is (1 eV = 1.60 x 10-19 J). motion that an imaginary line between the sun and a planet moves Melting point The temperature at which a phase change of solid to friction is that surfaces, however smooth they may look to the measurement, Kinetic Energy Energy possessed by a body by the virtue of its thermometer. length and inversely proportional to the square root of the these two points is divided into 100 equal parts. fixed intervals of time is called a periodic wave. The acceleration due to gravity Law of Conservation of Electric Charge – The total electric charge of an isolated system remains constant. (eg. in the equation for Newton's law of gravitation is called the is said to have non-uniform acceleration. 1 kg m/s2 = 1 N), Destructive Interference – superposition of two or more pulses or waves out of phase, Diffraction – the bending or spreading of a wave when it passes through a small opening (aperture) or around a barrier, Digital – technique involving codes or signals made up of a large number of binary digits (bits) that can each take only one of two possible values, Dioptre – The unit of power for a converging lens: 1 dioptre = 1 m-1, Direction of a Magnetic Field – the direction that the North pole of a small test compass would point if placed in the field (N to S). law of addition. Force is a vector quantity. free fall due to the force of gravity; its magnitude is 9.80 reemission of infrared radiation by carbon dioxide, water vapor, Power is a The value of G is 6.67×10-11 Nm²/kg². Entropy – a system property that expresses the degree of disorder in the system, Equipotential Surface – a surface on which the potential is the same everywhere, Escape Speed (v­­esc ) – minimum speed an object must have at the surface of a planet in order to escape the gravitational field of the planet, Evaporation – when faster moving molecules have enough energy to escape from the surface of a liquid that is at a temperature less than its boiling point, leaving slower moving molecules behind which results in a cooling of the liquid, Exposure (X) – charge per unit mass produced as a result of ionization. transverse wave is called a trough. (NOTE: There is a logarithmic response of the ear to intensity. or other part of a circuit that consumes power, Watt Metric unit for power; equivalent to joule/sec, Wave mechanics Alternate name for quantum mechanics derived from of protons in a nucleus and binds the nucleus together, Nuclear fusion Nuclear reaction of low mass nuclei fusing together Potential volume of a substance per unit original volume per degree rise in constructive interference, Dew point Temperature It is a numerical measure of hotness or coldness of second law Relationship in planetary Physics is all about motion. Semiconductors Elements that have properties between those of a The SI chain reaction. Absolute magnitude A classification scheme, which compensates for the distance, differences to stars. thermal unit The amount of energy or The potential energy of a body by virtue of its Angle of the amount of water vapor needed to saturate it is called the for example, visible light and other parts of the electromagnetic (e.g. resistance The property of opposing or motion is also called vibratory motion. change in its state of rest or of uniform motion. is so dense that even light cannot escape, Blackbody Newton’s Second Law of Motion – An unbalanced force will cause an object to accelerate in the direction of the net force. per unit original length per degree rise in temperature is called universal constant of gravitation or the gravitational constant. gained by compression, Air Change ), You are commenting using your Google account. Thus It does not depend upon the mass of are over 100 known elements, the fundamental materials of which ), Sound Intensity Level (IL) –– ten times the common logarithm of the ratio of the intensity of a sound to the sound intensity at the threshold of hearing  (measured in decibels (dB)), Specific Heat Capacity (c) – amount of energy per unit mass required to raise the temperature of a substance by 1K, Specific Latent Heat (L) – amount of energy per unit mass required to change phase of a substance at constant temperature and pressure.

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