| A | B |
|---|
| radiation | energy transmitted by electromagnetic waves |
| convection | a means of heat transfer by movement of the heated substance itself by currents and fluids |
| elastic collision | collision in which colliding objects rebound without lasting deformation or heat generation |
| momentum | the product of the mass and the velocity of an object |
| force | any influence that tends to accelerate an object - a push or pull |
| elastic limit | the distance of stretching or compressing beyond which an elastic material will not return to its original shape |
| inelastic collision | a collsion in which the colliding objects become distorted and or generate heat during the collision |
| rotation | the spinning motion that takes place when an object rotates about an axis located within the object |
| revolution | motion of an object turning around an axis outside the object |
| heat | energy transfer via random molecular motions, resulting in gain or loss of internal energy |
| Kelvin | the si unit of temperature |
| Celsius | a temperature scale with zero the melt-freeze for water and 100 boil-condense temperature of water at standard pressure |
| speed | how fast something is moving; the path distance moved per time |
| aneroid barometer | an instrument used to measure atmospheric pressure based on the movement of the lid on a metal box |
| velocity | the speed together with the direction of motion |
| thermostat | a type of valve or switch that responds to changes in temperature and is used to control temperature of something |
| vector | an arrow whose length represents the magnitude of a quantity and whose direction represents the diretion of the quantity |
| frequency | the number of events per time (cycles, vibrations, oscillations or any repeated event) |
| scalar | a quantity in physics such as mass, volume and time that can be completely specified by its magnitude it has no direction |
| period | time required for complete orbit |
| mass | a measure of an object's inertia also a measure of the amount of matter in an object |
| weight | the force on a body due to the gravitational attraction of anotther body |
