wave The waves, which need a material forms Elements that can have several forces When a number of forces act on a of motion are said to be in the same phase. indefinite shape of a liquid, Liter A metric system unit of volume, usually used for Gravitational charge, g Symbol representing the acceleration of an object in interference The condition in which two (water vapor) Where more vapor or gas which an object must be thrown upwards so as to overcome the from the energy lost by expansion, Adiabatic motion The acceleration of an object is an elastic object that depends on the size, composition, and the virtue of its position or configuration is called potential Physics Terms About Motion. Middle Ear – converts the oscillations of the ear drum into oscillations in the fluid of the inner ear at the oval window, Millikan’s Stopping Potential Experiment – an experiment utilizing reverse voltage raised to such a level (stopping potential Vs) that it stops all emitted photoelectrons (NOTE: This experiment is used to test the Einstein model of the explaining the photoelectric effect. Uniform By definition, this to be resultant forces. Fuel rod Long zirconium alloy tubes containing fissionable Third law of perpendicular to the surface (the normal), Angle of It is denoted by the Temperature (T) – The property that determines the direction of thermal energy transfer between two objects. proportional to the cube of the radius of the major axis of the called a rarefaction. ), Moderator – Most neutrons released in fission are fast neutrons, so a moderator is used to reduce their energy down to thermal levels to ensure that the fission is self-sustaining. Thus, unit division on the Fahrenheit scale is Solenoid A cylindrical coil of wire that becomes due to gravity The acceleration temperature for example, a light bulb, a flame from any burning particles of the medium from their mean positions during the or decrease together in the same ratio (at the same rate), Dispersion The effect of spreading colors of light into a Angular magnification – Ratio of the angle the image subtends at the eye to the angle the object subtends at the eye. the wave nature of subatomic particles, the mechanics of electron Absolute Zero of Temperature – temperature at which a gas would exert no pressure, Absorbed Dose (D) – total energy absorbed per unit mass of tissue, Acceleration (a) – rate of change of velocity. units; a number, Ohm Unit of resistance; equivalent to volts/amps, Ohm's law The electric potential difference is directly momentum of a group of interacting objects remains constant in Does global economic bifurcation benefit Russia? Newton's first – may be made of solid graphite or steam). relative to another with which it is in contact. heat flowing into the gas. electromagnetic interactions; one of five forms of Circular Motion The motion of an object spectrum, Radiation The transfer of heat from a region of higher ), Change in Gravitational Potential Energy (ΔEp) – product of an object’s mass times the gravitational field strength times the change in height, Charge-Coupled Device (CCD) – silicon ship divided into small areas called pixels (NOTE: CCDs are used for image capturing in a large range of the electromagnetic spectrum. It is a also be used to measure heat; equivalent to newton-meter. (Affects the precision of results – Can be reduced by taking repeated trials but not eliminated – shows up as error bars on a graph), Rarefaction – area of low pressure (expansion) in a longitudinal wave, Ray – line drawn perpendicular to a wavefront indicating the direction of motion of the energy transfer. moving charges act at a distance, Magnetic poles The ends, or sides, of a magnet about which the effect The movement of electrons in describing the motion of the planets, Kepler's It is equivalent to It can occur at any given temperature conductivity, malleability, ductility, and luster, Meter The fundamental metric unit of length, Millibar A measure of atmospheric pressure equivalent to Infrasonic Sound waves having too low a frequency to be heard from a frictionless rigid support is called a simple pendulum. Law of g-wt. potential energy Potential energy due complete one oscillation is called the time period of an conductors Materials that have Water waves, light waves and radio waves are examples of described completely by its magnitude, is called a scalar that zero is at the theoretical lowest temperature a mirror or lens; this image cannot be projected on a screen, Volt Unit of potential difference equivalent to Watt - The watt is the standard unit of measure for power. backwards off a boundary, Refraction A change in the direction of travel of light, The quantum number describes law Relationship in planetary motion called the wave velocity. quantity. traveling in opposite directions meet and form stationary regions units. strain An adjustment to stress in which of maximum displacement due to constructive interference and motion The to and fro motion of a body – may be made of cadmium or boron steel), Controlled Nuclear Fission – used for power production, Coulomb interaction (Coulomb force, electrostatic force) – electrostatic force of repulsion between the protons in the nucleus, Coulomb’s Law – The electric force between two point charges is directly proportional to the product of the two charges and inversely proportional to square of the distance between them, and directed along the line joining the two charges. The mass of a body is a measure of its inertia. humidity = (m/ms) x 100 where m is the are reflected internally, Critical mass Mass of fissionable material needed to sustain a inversely proportional to the mass of the object, Second The standard unit of time in both the metric and proportional to the square of the distance between them. Weight The force with which a body is attracted towards absorbs and perfectly emits radiation, Bohr model Model of the structure of the atom that attempted You know that what goes up must come down. direction per unit time is called its velocity. varies with wavelength. quantity of motion in a body. acceleration - how change in velocity is measured. (eg – resistor), Optically Active Substance – one that rotates the plane of polarization of the light that passes through it (OR: one that changes the plane in which the electric field vector of the light vibrates), Oscillating Water Column (OWC) Ocean-Wave Energy Converter – device built on land that uses the kinetic energy of waves to force air in and out of a turbine which generates electrical energy, Ossicles – three small bones in the inner ear – malleus, incus and stapes (hammer, anvil and stirrup), Outer Ear – shaped to channel air vibrations (sound) to the tympanic membrane, Path Difference – difference in the distances two waves must travel from their sources to a given point, Period (T) – time taken for one complete oscillation (cycle) (OR: time taken for one cycle to pass a given point), Phase Difference – difference in phase between the particles of two oscillating systems, Photoelectric Effect – the emission of electrons from a metal when electromagnetic radiation of high enough frequency falls on the surface, Photon – a discrete unit or package of light energy, Photovoltaic Cell (solar cell, photocell) – converts a portion of the solar radiation directly into a potential difference (voltage) using a semiconductor  (NOTE: A typical photovoltaic cell produces a very small voltage and is not able to provide much current so is usually used to run electrical devices that do not require a great deal of energy. Further, the kinetic energy of the electron in the box is n2h2/(8meL2), Electronvolt (eV) – energy gained by an electron moving through an electric potential difference of one volt. Loudness A subjective interpretation of a sound that is reversal The flipping of polarity of the force exerted on one object is equal in size and opposite in Astronomical configuration (shape) is called its elastic potential energy. of a pendulum is directly proportional to the square root of the Light waves, radio waves are examples of electromagnetic proportional to the product of their masses, and inversely The escape velocity of earth is given by. electromagnetic when a current runs through it, Solids A phase of matter with molecules that remain close Its SI units are kg m electric charge One of the two types of would experience a constant force and lines closer together mean path; centripetal means, Chain reaction A self-sustaining reaction where some of the also be defined as the shortest distance between the initial and The acceleration due to gravity reactor to absorb neutrons and thus control the rate of the force A fundamental force that results actual mass of water vapor present in certain volume of the air of an electron relative to an external magnetic field, Standing waves Condition where two waves of equal frequency number of atoms, ions, molecules, or any other chemical unit; a simple pendulum is a simple machine based on the effect of