Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# physics cset

### cset multi

Question | Answer |
---|---|

absolute zero | the lowest possible temperature, equal to 0 degrees K, -273 degrees C or -459 degrees F |

buoyancy | the upward force on an object immersed in a fluid |

calorie | a unit of measurement of energy; the amount of heat required to raise the temperature of one gram of water |

capillarity | the ability of liquids to rise in very thin tubes |

centrifugal | toward the perimeter |

centripetal | toward the center |

chain reaction | occurs when the fission of one atom causes the fission of other atoms |

conduction | transfer of heat or electricity |

conservation of energy | energy may be changed from form to another, but it cannot be created or destroyed |

density | mass per unit volume |

doppler effect | the apparent change of pitch due to differing motions of the sounding source and a listener |

electric current | the flow of electrons; a direct current (DC) flows in one direction, while an alternating current (AC) periodically reverses the direction of flow |

energy | the ability to perform work; kinetic energy is due to a body's motion, whereas potential energy is due to a body's position |

fission | the splitting of an atomic nucleus into several lighter nuclei |

fusion | nuclear fusion is the union of atomic nuclei to a heavier nucleus |

gravitation | the attraction of bodies because of their masses |

half-life | the time required for the radioactivity of a substance to drop to half its original level |

heat | kinetic energy of molecular motion |

hypothesis | a tentative explanation of a phenomenon |

inertia | the ability of a body to resist acceleration and continue at rest or moving with uniform velocity |

mass | the quanity of matter; the measure of inertia |

momentum | the product of mass and velocity; the conservation of momentum is a fundamental law of nature |

photon | a particle of light energy |

pitch | the frequency of a sound wave |

prism | a triangular piece of glass used to disperse white light into a spectrum |

radioactivity | the spontaneous decay of an atomic nucleus with the emission of alpha particles, beta particles, or gamma rays |

refraction | the bending of a light wave at the boundary between two substances |

relativity | the principle that the laws of physics are the same for any two observers, whatever their relative motion |

spectrum | the band of colors from the dispersal of white light; |

electromagnetic spectrum | is the total range of frequencies for electromagnetic waves, including radio and light waves |

temperature | the average kinetic energy of a group of molecules; it determines the direction of heat flow |

thermodynamics | the study of heat energy |

volt | a unit of measurement of electrical potential; the amount of work necessary to move the charge |

watt | a unit of measurement of electrical power, the rate at which electrical energy is dissipated |

weightlessness | a condition where accelerating forces precisely offset one another |

work | the product of force and distance; it measures the action performed on an object |

physics | the most basic and most general of the natural sciences; covers subjects from matter to energy in the most general way |

scientific method | requires observation, conjecture, calculation, prediction and testing |

measurement | the beginning of scientific wisdom |

basic units of the metric system | length, volume, mass, meter, liter and gram |

motion | described by stating an object's position, velocity and acceleration. |

velocity | the rate of change of position with time |

acceleration | the rate of change of velocity with time |

Newton's laws | relate the motion of an object to the forces acting upon the |

law of inertia | asserts that in the absence of any force, a body at rest will continue at rest, while another body moving in a straight line will continueto move in that direction with uniform speed. Any change of speed or direction must be due to a force |

law of acceleration | states that a body acted on by a force will undergo acceleration proportional to the force |

law of reaction (Newton) | says that every action there is an equal and opposite reaction |

gravitation | is familiar to us through weight, which is direction proportional to mass |

potential energy | for the position could be converted into movement |

thermal energy | heat can be converted to motion and motion can produce heat |

electricity and magnetism | forms of energy, for they can be converted into heat and motion |

law of conservation of energy | states that energy can be neither created nor destroyed |

sound | is produced by the mechanical disturbance of a gas, liquid, or solid |

electricity | exists where the number of negative electrons does not precisely equal the number of positive protons |

magnetism | is displayed by permanent magnets and around electric currents |

light | seems to travel in perfectly straight lines as ray |

nuclear energy | has been obtained by two different means, fission and fusion |

Quantum theory | originated when Max Planck discovered that the radiation of energy from a heated body occurs only in integral multiples of a small quanitity (1901). |

quantum | is the product of the frequency of radiation f and the universal constant h, now known as Plancks's constant |

photoelectric effect | light induces an electric current in metals, suggests that light acts as particles of energy called photons |

uncertainty principle | it is impossible to determine the exact position and momentum of a particle |

Created by:
josboys